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59 Posts
Discussion Starter · #1 ·
I have bought and read Vance's loudspeaker cookbook, and read tons of things on the web about speaker design and I think I am missing something. Everyone seems to say that the crossover can make or break a system. My question is why, or how? I am about to start work on my fianl design for my home speakers and have chosen to go with GR-research drivers all around. For the price I haven't seen anything flatter, and I haven't read anything bad about them either. They seem flat all the way out to tweeter territory, so I figured if I got a crossover and had it at 3K I would be fine. But with a lesser speaker I may have to go at 2K. Is this ok, or am I missing something that makes this decicion so hard? I am getting the feeling that the decision to make it 3K was too easy and there is something else I am not thinking of. What do you think?

You can look at the response graphs at Gr-research's website, they are the M-130, with the T1 tweeter matched pairs. Please let me know before I go screw it up.


59 Posts
Discussion Starter · #2 ·
oh by the way, the crossovers would probably be from Parts Express, the 2 way Dayton 12db Linkwitz 3K crossover. I have thought of using the M-130 speaker that is 16ohm and doing them in parallel, so there is 1 tweeter and 2 mids on each front/center. If any of this matters, I don't know.

410 Posts
>>Everyone seems to say that the crossover can make or break a system. My question is why, or how?

1,385 Posts
Yup, take AZ Barber's advice.
IMO, after months of research - for my preferences I'm leaning towards all 1st order xovers & Accuton drivers in separate sealed enclosures. Unless I go with horns & expensive AER drivers (now from BD-Design). Vance has a good book, but there's tons of valuable info on the web. Besides crossovers, there's baffle diffraction & many different types of speakers (dipolar, sealed/acoustic suspension...), room acoustics, materials etc...

This calculator - two-way first-order Butterworth crossover network http://www.carstereo.com/help/Articles.cfm?id=8

Loud Speakers 101 http://www.carstereo.com/help/Articles.cfm

Two-Way Crossover Network Design http://www.carstereo.com/help/Articles.cfm?id=3

Multi-Way Crossover Design http://www.trueaudio.com/st_xov_1.htm

Two-way cross-over basics. What IS a crossover? http://www.mmxpress.com/technical/twoway.htm

Balanced vs Unbalanced, Passive vs Active http://www.bssound.com.au/advice/bsadvice.htm

Building your own 2nd order passive Crossover network http://www.colomar.com/Shavano/crossover12db.html

The Subwoofer DIY Page v1.1 Subwoofer Integration http://www.diysubwoofers.org/misc/sub_integration.htm

RME level adjustment +4/-10 dBu and servo balanced inputs and outputs http://www.rme-audio.com/english/aeb/index.htm

Matt's DIY audio page http://kahuna.sdsu.edu/~tucker/diyaudio/diyaudio.html

X-overs and Bi-amping http://kahuna.sdsu.edu/%7Etucker...ramblings.html

24db/octave Linkwitz-Riley http://kahuna.sdsu.edu/%7Etucker/diyaudio/xover.html

Active Crossovers for DIY Speaker Builders http://www.snippets.org/filters/crossover.htm

THIEL SmartSub Controller - "Do I need a crossover?" http://www.thielaudio.com/THIEL_Web/...needxover.html

The HS500. The most powerful plate subwoofer amp available to the DIYer today http://www.adireaudio.com/diy_audio/...iers/hs500.htm

Integrating A Subwoofer With Your HiFi http://www.audioetc.tv/articles/inte...erwithhifi.htm

Subwoofers for Music - EXCELLENT http://www.soundstage.com/maxdb/maxdb200101.htm

Google search - subwoofer low frequency cut-off filters (e.g. 16Hz...) http://www.google.com/search?hl=en&i...ut-off+filters

Why is it so difficult for subwoofers to blend into a system? http://www.vandersteen.com/pages/Answr9.htm

The Marriage Between the Subwoofer and Tower Speakers http://www.audioholics.com/techtips/...fer_towers.php

ACI Subwoofer Primer http://www.audioc.com/information/subwoo.htm

It is common knowledge that crossovers contribute to coloration http://www.merlinmusic.com/reviews/hfr_495.htm

SPEAKER PASSIVE CROSSOVER ASCENSION http://www.jensencapacitors.com/audi...s/artikel.html

"crossoverless" speakers http://www.onhifi.com/askwes/ask0014.htm

Removal of the crossover eliminates phase & group delay distortion http://www.brentworth.com/

and delivers a musical performance that has every nuance preserved

Why horns http://www.hornspeakers.info/

Adire Audio - Maelstrom http://www.adireaudio.com/diy_audio/.../maelstrom.htm

Neutralizing L(e) with a Zobel Network http://www.trueaudio.com/st_zobel.htm

Subsonic Filters are high-pass crossovers centered around 25-30Hz http://www.rockfordfosgate.com/scrip...php?p_faqid=68

subwoofer subsonic filters - Google search http://www.google.com/search?hl=en&i...bsonic+filters

SVS Amp Interface by Marchand Electronics http://www.svsubwoofers.com/marchandsubsonic.htm

No need for subsonic filtering - sealed design http://www.danmarx.org/audioinnovation/theories.html

Sealed Subwoofers http://www.acc.umu.se/~sagge/audio/1259/

Sealed Speaker Enclosure Design Calculator http://www.loudspeakers101.com/SealQtc.htm

How The Linkwitz Transform Circuit Works - and qtc .707 sealed subwoofer http://sound.westhost.com/linkwitz-transform.htm

Therefore a hipass or "subsonic" filter, even for sealed boxes, could help reduce distortion http://www.diysubwoofers.org/projects/cartf/

Sealed Box Subwoofer http://home.insightbb.com/~stephenwm..._Subwoofer.htm

Marchand WM8 "BASSIS" Bass Correction Equalizer http://www.marchandelec.com/wm8.htm

The sealed system provides the best group delay numbers http://www.adireaudio.com/tech_papers/sub_gd.htm

Phase, Time and Distortion in Loudspeakers http://sound.westhost.com/ptd.htm

speaker sub enclosures http://www.madisound.com/

REL Strata III Subwoofer review - let mains run full! http://www.21stcenturyservices.com/audio/REL_Strat3.htm

The Perfect Subwoofer http://www.21stcenturyservices.com/audio/perf_sub.htm

Extended Low Frequency or ELF - mains run full... (active sub) http://sound.westhost.com/project48.htm

Thiele - Small Analysis of Loudspeaker Enclosures http://www.silcom.com/~aludwig/Sysde...l_analysis.htm

250W SUBWOOFER AMPLIFIER w/REMOTE CONTROL http://www.partsexpress.com/pe/pshow...=300-793&DID=7

subwoofer Class D - Class AB amplifier http://www.xcs.no/index.php?artikkelid=67&back=1

KGND-52100 Powered Subwoofer Amplifier Class D 1000 Watts @ 4 Ohms http://www.madisound.com/kgnd.html

Velodyne SPL-800 Class D subwoofer amp review http://www.audioholics.com/productre...SPL800-p3.html

subwoofer in and out of phase, phase reversing - Google search http://www.google.com/search?hl=en&i...=Google+Search

Audioreview - subwoofers http://www.audioreview.com/Subwoofers/PLS_2741crx.aspx

Welcome to Madisound Speaker Components! http://www.madisound.com/

The Subwoofer DIY Page v1.1 Definitions http://www.diysubwoofers.org/misc/dumax/dumax.htm

Updated NOUSAINE subwoofer data list http://www.avsforum.com/avs-vb/showt...light=nousaine

Updated NOUSAINE subwoofer data list http://members.cox.net/frankcarter/T...Sub%20Data.htm

True Balanced outputs http://www.avsforum.com/avs-vb/showt...hreadid=301971

subwoofer calibration system - software http://www.etfacoustic.com/

Adire Maelstrom Speakers Review by Pland http://www.audioasylum.com/audio/spe...ges/97841.html

THE ANCIENT AUDIOPHILE'S QUEST FOR THE ULTIMATE HOME SYSTEM http://invalid.ed.unit.no/~dunker/ultimate.html

ð Speakers Frequency Response http://www.pispeakers.com/PiGraph.htm

Multiple Subs http://www.avsforum.com/avs-vb/showt...hreadid=298137

Biamplification basics - an article http://www.audioasylum.com/audio/gen...ges/57210.html

DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm

DIY Loudspeaker Designer's Selection Guide (the LDSG) http://ldsg.snippets.org/index.php3

Section 7 - Recommended drivers http://ldsg.snippets.org/sect-7.php3

Recommended drivers technical specifications http://ldsg.snippets.org/sect-12.php3

Appendix A - Loudspeaker Design http://ldsg.snippets.org/appdx-a.php3

LDSG Appendix A - Enclosure designs http://ldsg.snippets.org/boxes.php3#SEALED

Section 17 - Suppliers of prefabricated enclosures http://ldsg.snippets.org/sect-17.php3

Section 16 - Recommended louspeaker kits and plans http://ldsg.snippets.org/sect-16.php3

Speakerbuilding.com http://www.speakerbuilding.com/content/1014/page_5.php

Home Audio DIY Speaker FAQ http://www.lalena.com/audio/faq/speaker/

Details of the VR-6 and VR-8 Technology http://www.vonschweikert.com/vrline/VR-6W.HTM

JPO Speakerbuilding Linklist http://members.chello.se/jpo/

Try downloading a program like WinISD Pro alpha http://www.linearteam.dk/

Welcome To DIYSPEAKERS.NET http://www.diyspeakers.net/

spherical cermaic speakers - least distortion http://www.zako.com/techrev.htm

How to Design a Sealed Loudspeaker? - Qts, Fs sealed speaker enclosure... http://gecko.gc.maricopa.edu/~jmurba...dio/sealed.htm

Thiele-Small Terms and Definitions or just "T/S Parameters" http://www.mmxpress.com/technical/terms.htm

Zobel Networks, speaker design http://www.adireaudio.com/tech_papers/tech_central.htm

Speaker design calculator http://www.mhsoft.nl/spk_calc.asp

Neutralizing L(e) with a Zobel http://www.trueaudio.com/st_zobel.htm

Initial Enclosure and Crossover Designs - Zobel network http://www.angelfire.com/electronic/...modelling.html

Passive Crossover Basics - Zobel Networks http://www.eatel.net/~amptech/elecdisc/xoorder.htm

Crossover Design http://www.silcom.com/~aludwig/Sysde...ove_Design.htm

Sample 3 Way Crossover http://www.lalena.com/audio/faq/xover/

DIY audio homepage http://www.lalena.com/audio/

The Loudspeaker Design Cookbook - $39.95 http://www.amazon.com/exec/obidos/tg...91827?v=glance

Part II: Digital Filters* http://www.silcom.com/~aludwig/Signa...al_filters.htm

Design of the Sound System http://www.silcom.com/~aludwig/Sysde...und_system.htm

Crossover Design http://www.silcom.com/~aludwig/Sysde...ove_Design.htm

Construction of the Loudspeakers http://www.silcom.com/~aludwig/Louds...Time_alignment

DIY'ers perspective on the top-selling Bose system http://www.intellexual.net/bose.html

Design of Loudspeakers http://www.linkwitzlab.com/design_of_loudspeakers.htm

Crossovers - 1st order http://www.linkwitzlab.com/crossovers.htm

F - Group delay and transient response http://www.linkwitzlab.com/frontiers.htm#H

JBL horns, speakers http://www.usspeaker.com/

Impedance Equalization Designer Help - Zobel Networks http://www.lalena.com/audio/calculat...ual/help.shtml

3-way 1st order crossover is used in a 3-way vented enclosure system http://www.kbapps.com/audio/speakerd...xover3way.html

Slop Of The Crossover - tweeter/1st order @ 2kHz NO GOOD... http://www.caraudiogalaxy.com/caraud...pcrossover.htm

ScanSpeak tweeters - Google search http://www.google.com/search?hl=en&i...Speak+tweeters

tweeter 1st order crossover - Google search http://www.google.com/search?hl=en&i...rder+crossover

Time aligned, Phase coherent, Phase aligned, http://www.geocities.com/kreskovs/TimeAligned2.html

Transient accurate, What's up with that.

Appendix E - Passive Crossover Components http://ldsg.snippets.org/appdx-e.php3

Crossover Demos http://www.silcom.com/~aludwig/Crossover_demos.html

Topic: 3 way 1st order crossover http://www.electrical-contractor.net...ML/000006.html

Transient Perfect 2nd Order Crossover http://www.geocities.com/kreskovs/CrossoverdocN.html

3-Way Series Cross-Over http://users.tpg.com.au/users/gradds...oss-overs8.htm

3-way 1st order crossover - Google search http://www.google.com/search?hl=en&l...rder+crossover

cascading 1st order slopes http://www.mindspring.com/~chucksaudio/eqptrept.htm

Linkwitz-Riley Active Crossovers up to 8th-Order: An Overview http://www.rane.com/note119.html

Very High Quality DIY speakers anywhere? http://www.avsforum.com/avs-vb/showt...hreadid=170942

A full 300W into 4 Ohms, this CLASS D unit runs very cool http://www.adireaudio.com/diy_audio/...iers/dt300.htm

DIY parts, tech site http://www.partsexpress.com/

Understanding and Designing Passive and Active Crossovers http://www.termpro.com/articles/xover.html

Designing Passive Crossovers http://www.termpro.com/articles/xover2.html

Crossover Component Selection Guide http://www.partsexpress.com/resources/xover.html

A Different Approach to Series Networks http://www.geocities.com/jonrisch/LBIseries.htm

L-Pad Designer Help http://www.lalena.com/audio/calculator/lpad/help.shtml

Impedance Equalization Designer Help http://www.lalena.com/audio/calculat...ual/help.shtml

Inductors, Capacitors, & Resistors http://www.lalena.com/audio/electronics/rcl/

chart of the frequency range of various instruments http://www.silcom.com/~aludwig/Sysdes/Musicsp.gif

Music and The Human Ear http://www.silcom.com/~aludwig/EARS....e_vs_objective

Fostex Speaker Components - mid-hi drivers http://www.fostex.com/index2.asp?fil...nge/full_range

Fostex Speaker Components - mid-hi drivers http://www.madisound.com/fostex.html

Thiel CS7.2 Specifications 4-way system http://www.thielaudio.com/THIEL_Web/Pages/cs7_2.html

Sealed box - resonance hump (Zobel Networks) http://www.speakerworkshop.com/SW/Pr...losure%20A.htm

Filters, Zobel Network calculator........... http://users.telenet.be/educypedia/e...torsfilter.htm

The Naked Truth about Speaker-Cables http://www.tnt-audio.com/clinica/spkcbl_e.html

The Naked Truth about Interconnect Cables http://www.tnt-audio.com/clinica/intere.html

Series Notch Filter Designer Help http://www.lalena.com/audio/calculat...tch/help.shtml

Passive Radiator Enclosures: In Theory and In Practice http://momentum.soundillusions.net/august02/tech2.html

RLC circuits match transmission lines to loads http://www.e-insite.net/ednmag/archi...97/08di_05.htm

How well do Zobel circuits stabilize the impedence of a driver? http://www.geocities.com/vyque/Caraudio/passives3

Driver Attenuation Circuit - L-Pad http://www.loudspeakers101.com/Lpad.htm

Loudspeakers 101 main page http://www.loudspeakers101.com/Sound.htm

Maximum Power (Resonance) in Series RLC Circuits http://www3.ltu.edu/~s_schneider/phy...esonance.shtml

Solen printed circuit boards - Lpad http://www.solen.ca/pcb2way.htm

"predicted" impedance http://www.lonesaguaro.com/speakers/...lImpedance.gif

L-PADS - calculator!!!!!!!!!!! http://www.eatel.net/~amptech/elecdisc/lpad.htm

Series crossovers, how do they work? And parallel circuits http://home.hetnet.nl/~geenius/Crossover.html

Simplest is best! 1st order, 6dB/octave slope http://members.myactv.net/~je245/spktips.htm

SoundEasy V8.00 has been released - $249.95 http://www.audioxpress.com/bksprods/sotware/sof-sou.htm

First Order (6db/octave) Two-Way Crossover calculator http://ccs.exl.info/calc_cr.html

Unibox software - Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubtxt.htm

Unibox software - Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubdwnld.htm

Series vs. Parallel Wiring http://www.termpro.com/articles/spkrz.html

FRD Consortium is group of designers, experts, hobbyists and programmers http://www.pvconsultants.com/audio/frdgroup.htm

FM (Filter Maker) is a utility for creating Digital Filter Transfer Functions http://www.pvconsultants.com/audio/dsp/dplay.htm

Plotting a Speaker's Impedance: http://www.eatel.net/~amptech/elecdisc/resvsimp.htm

LMS - Loudspeaker Measurement System - $1395 http://www.linearx.com/products/anal...LMS/LMS_01.htm

Passive Crossover Basics http://www.eatel.net/~amptech/elecdisc/xoorder.htm

speaker crossover design software - GOOGLE search http://www.google.com/search?hl=en&l...esign+software

plotting speaker's impedance - GOOGLE search http://www.google.com/search?hl=en&i...%27s+Impedance

loudspeaker simulation software - GOOGLE search http://www.google.com/search?hl=en&i...=Google+Search

The gold standard in analog/digital simulation - Micro-Cap 7 http://www.spectrum-soft.com/demo.shtm

True Audio - Welcome to the Loudspeaker Design Center! http://www.trueaudio.com/win_abt1.htm

Loudspeaker Design Tutorial cont.: Page 3 http://www.trueaudio.com/about_3.htm...ce%20Response_

About WinSpeakerz http://www.trueaudio.com/win_abt1.htm

Multi-Way Crossover Design http://www.trueaudio.com/st_xov_1.htm

Tech topics http://www.trueaudio.com/st_index.htm

True Audio's WinSpeakerz Design Software review +book review!!!!! http://www.hometheaterhifi.com/volum...ctober-99.html

TrueRTA does not have gating (below 300-500Hz measurements) http://home.new.rr.com/zaph/audio/audio-speaker11.html

Input and output sampling rates are adjustable up to 48kHz http://www.soniccontrol.com/news/feb...rueaudio.shtml

Also, Oscilloscope for Windows http://polly.phys.msu.su/~zeld/oscill.html

Techron TEF-20 analyzer - acoustic measurements http://www.speakerbuilding.com/content/1014/page_8.php

A summary of recommended speaker design software packages http://ldsg.snippets.org/appdx-c.php3

SOUNDEASY v. 8.00 JUST RELEASED http://www.audioxpress.com/bksprods/sotware/sof-sou.htm

Version 8.00 New Features and Improvements http://www.audioxpress.com/resource/...fsouimprov.htm

SoundEasy V8.00 has been released http://www.e-speakers.com/

SoundEasy V8.00 has been released - about the programs http://www.interdomain.net.au/~bodzio/

SoundEasy V8.00 has been released - about the programs http://www.interdomain.net.au/%7ebodzio/

SoundEasy V8.00 - import from PC-based measurement systems http://www.interdomain.net.au/~bodzio/

SoundEasy (which I use to model things like non-linear distortion, etc.) http://www.speakerbuilder.net/web_fi...ts/DBP/dbp.htm

SoundEasy - Yahoo users e-group http://groups.yahoo.com/group/SoundEasyuserslist/

EasyLab - Advanced is an expanded section of SoundEasy http://www.interdomain.net.au/~bodzio/

Small-signal parameter of the Dayton 295-300 woofer http://www.speakerbuilder.net/web_fi...ts/DBP/dbp.htm

small signal and large signal analysis http://www.ht-audio.com/e-topic9.htm

difference between small signal model and large signal model? http://www.elektroda.pl/eboard/topic56704.html

LSP CAD - justMLS PC-based measurement system http://home.earthlink.net/~etunstal/diy.htm

LspCAD is short for Loudspeaker Computer Aided Design http://www.ijdata.com/intro.html

LspCAD official site http://www.ijdata.com/

using JustMLS and LSPCad http://www.lonesaguaro.com/speakers/Topaz/Topaz.htm

using JustMLS and LSPCad - excellent measurements tutorial http://www.geocities.com/kreskovs/John1.html

Girardin mic Liberty Instruments http://www.libinst.com/us_domestic_pricing.htm

DIY Speaker Testing Microphone Preamp - Take 2 http://www.gti.net/wallin/audio/preamp2/preamp2.html

True Audio TrueRTA - How might I use a Real Time Audio Analyzer? http://www.trueaudio.com/rta_faq1.htm

Panasonic microphone caplets http://www.panasonic.com/industrial/...ts/rec_mic.htm

A DIY Speaker Testing Microphone http://www.speakerbuilder.net/web_fi...diymicmain.htm

MIC-01 and MIC-02 are low cost precision condenser electret microphones http://www.e-speakers.com/products/clio.html

CLIO MIC-01 - $233.80 Lite - or our own Mitey Mike II http://www.audioxpress.com/bksprods/kits/kc-cliom.htm

"all in one measurement jig" http://www.ijdata.com/justMLSjigCharlesRydel.pdf

audio measurement supplies http://www.audioxpress.com/bksprods/kitsindex.htm

OMP/MF Mono Power Amp Modules from BK Electronics http://www.audioxpress.com/bksprods/kits/km-14a.htm

Power Amp Modules ILP Direct Ltd, UK http://www.audioxpress.com/bksprods/kits/ki-hy2000.htm

Developing a DIY speaker inspired by the Wilson Audio X1 SLAMM http://www.cliowin.com/FOTO/gpphoto/Hancock/slamm.htm

Linkwitz - Panasonic omni-directional back electret microphone cartridge http://www.linkwitzlab.com/sys_test.htm#Mic

Loudspeaker Systems Using CALSOD 3.10 http://www.sonicdesign.se/calsinfo.html

Comparison of calculated and measured SPL curve [in half-space]

of a Vifa P17WJ-00-08 woofer http://www.geocities.com/f4ier/xoversimFAQ.htm

"Calibrating" your Radio Shack SPL meter http://www.speakerworkshop.com/forum...opic.php?t=610

QuickMix - setting the audio mixer on your Windows computer http://www.msaxon.com/quickmix/index.htm

Speaker Workshop Project Main http://www.speakerworkshop.com/SW/Project/Main.htm

How to use Speaker Workshop from Audua http://www.gti.net/wallin/audio/audua/audua.html

Speaker Workshop by Audua web site http://www.speakerworkshop.com/

JIG II and Speaker Workshop http://www.gti.net/wallin/audio/SW/SW.html

DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm

CLIOwin home page http://www.cliowin.com/index.htm

CLIOWin Lite Electroacoustic Measurement System http://www.audioxpress.com/bksprods/kits/kc-cliom.htm

Acoustic links - MANY!!!!!!!!!!!!!!!!!!!! http://groups.yahoo.com/group/acoust..._001014290697/

Measurement Systems http://members.aol.com/nameaudio/links/measure.htm

Liberty Audiosuite

frequency response of the tweeter measured on a LAud setup http://www.io.com/~patman/s2.html

North Creek Music Systems - DIY matched drivers http://www.northcreekmusic.com/LoudspeakerProjects.html

SpectraPLUS 2.32 SpectraPRO 3.32 SpectraLAB 4.32 - home page http://www.cetaceanresearch.com/analysis.html

HobbyBox German home page http://www.audio-software.de/hobbybox_v_5_mls.html

LspLab home - English home http://hem1.passagen.se/johnygre/ENG/index.htm

LspLab home - $400 with mic http://hem1.passagen.se/johnygre/ENG/index.htm

Sample Champion is an accurate and easy to use audio measurement software http://www.purebits.com/scoverview.html

Sample Champion Application notes - Impulse and Frequency Response http://www.purebits.com/appnotes.html

Impedance measurement and Thiele-Small parameters computation http://www.purebits.com/appnote16.html

Impedance measurement: pratical construction of the connector http://www.purebits.com/appnote17.html

Speaker Measurement Jig - chose Sample Champion http://www.raymondaudio.nl/projects/.../project9.html

PC Sound Card Page http://www.epanorama.net/links/pc/sound.html

The Subwoofer DIY Page v1.1 Measurements http://www.diysubwoofers.org/measure.htm

How do i measure the TS parameters of a misc driver? http://www.diysubwoofers.org/cgi-bin...&msg_num=34170

Acoustic Measurement Software http://www.me-au.com/measure.html

ETF3.0 is a software application designed to aid in the tuning of sound systems http://www.me-au.com/etf.htm

SPL calculations http://www.adireaudio.com/tech_papers/spl.htm

How many components? Well, the crossover.... http://www.adireaudio.com/tech_paper...crossovers.htm

Software for Speaker Design http://melhuish.org/audio/software.htm

Driver manufacturers http://www.speakerbuilding.com/drivers/

"close tolerances with their actual/advertised Thiel/Small parameters" - NOT!!! http://www.ellisaudio.com/technology.htm

DIY speaker building information http://home.earthlink.net/~etunstal/diy.htm

FAQ: Frequently Asked Questions about Praxis http://www.libinst.com/praxfaq.htm

So, what does the AudPod do? http://www.libinst.com/praxfaq.htm#t7

Liberty Instruments home page - Praxis, AudPod system http://www.libinst.com/

Re: T/S parameters - Praxis http://www.libinst.com/_disc2/00000033.htm

Praxis forum http://groups.yahoo.com/group/laudus...1?viscount=100

DIY Speaker Testing Microphone Preamp - Take 2 http://www.gti.net/wallin/audio/preamp2/preamp2.html

Golden Ratio speaker design http://www.cs.northwestern.edu/~pdin...s/designs.html

Irrational numbers and cabinet design http://www.soton.ac.uk/~apm3/diyaudio/Irrational.html

Spherical Speakers http://www.oddnoise.com/spheres.html

Cabasse iO spherical satellite system http://www.cabasse.com/english/io/

Gallo spherical speakers http://www.anthonygallo.co.uk/productindex.html

Spherical speaker design http://www.zako.com/techrev.htm

Zako ZM99 bowling ball ceramic spherical speakers review - 3 stars http://www.hifichoice.co.uk/review_print.asp?ID=1652

TRIO Classic perfectly reflects the dynamics of the spherical horns http://www.gtaudio.com/speakers.html

Avantgarde Acoustic Uno Series Two loudspeaker: Robert Deutsch review http://www.stereophile.com/showarchives.cgi?287:11

stuffing/damping material lowers Q, Fs - same as increasing enclosure volume http://www.wmeckle.com/1259/1259.htm

stuffing/damping material lowers Q, Fs - same as increasing enclosure volume http://www.danmarx.org/audioinnovation/theories.html

A Hell of a Show - spherical speakers "with balls" http://www.soundstage.com/audiohell/audiohell200302.htm

Spherical piezoelectric ceramic speaker http://www.murata.com/news/1996/0423e.html

Artistic Audio Möbius - ball perched atop a shiny, fork-shaped tuning stand http://www.smr-home-theatre.org/ces2...mage_008.shtml

Artistic Audio Möbius - ball perched atop a shiny, fork-shaped tuning stand http://www.artisticaudio.com/mobius.asp

Odyssey Setup & Tweak Tips http://odysseyaudio.com/setup_tweak.html

Audio links page, DIY... http://joemacjr.home.att.net/diyproject/links.html

speaker drivers - Seas, Vifa... http://www.linkwitzlab.com/orion_challenge.htm

VonSchweikert Audio VR 2 Speakers Review by ka7niq http://www.audioasylum.com/audio/spe...es/132286.html

Modifying the Vifa tweeter - resonance chamber stuffing, resonance Fs drops http://www.io.com/~dylan/speakers/vifas.html

Robin Marshall: A Modicum of Genius - tweeters, resonance, low Q... http://www.stereophile.com/showarchives.cgi?567:3

2.1 Driver Evaluation in Closed Boxes http://www.trueaudio.com/about_2.htm

Tempest application notes - Bessel .577, Butterworth .707 Qtc http://www.adireaudio.com/Files/Seal...plications.PDF

FRD Consortium - frequency response data & tools http://www.pvconsultants.com/audio/frdgroup.htm

Section 1 - Driver guidelines http://ldsg.snippets.org/sect-1.php3

Linear Team - WinIsd 4.x Beta & Alpha Pro - driver database http://www.linearteam.dk/default.aspx?pageid=winisdpro

WAV-Normalizer - not that good - Maximizes volume level in multible wav-files http://www.linearteam.dk/default.asp...=wavnormalizer

Drivers are listed in alphabetical order http://melhuish.org/audio/drivers.htm

UNDERSTANDING LOUDSPEAKER DATA http://www.eminence.com/eminence/pag...s02/params.htm

Klipsch RF-7 specifications http://www.reliableaudiovideo.com/kliprf7newmo1.html

Klipsch RF-7 specifications http://www.klipsch.com/product/product.aspx?cid=362

Klipsch RF-7 reviews http://www.audioreview.com/PRD_129356_1594crx.aspx

Recommended horn tweeters summary: http://ldsg.snippets.org/sect-10.php3

"How to eliminate low frequency noise cancellation with proper woofer placement." http://www.audiovisualdevices.com.au...ey/woofer.html

How crucial is the localization near the floor? http://www.speakerbuilding.com/content/1039/page_2.php

The Oris Horn Page http://www.welbornelabs.com/oris.htm

The horn speaker home page http://invalid.ed.unit.no/~dunker/horns.html

Specs for JBL drivers http://invalid.ed.unit.no/~dunker/jblspecs.html

The Ambiophonic method is applicable to two-channel sources http://www.ambiophonics.org/

Capacitors in Crossover Network http://www.audioasylum.com/forums/hu...ges/57036.html

The Maya Horn System, Oris horns... http://www.moondogaudio.com/products.htm

Modification of a Klipsch horn (bass) http://www.speakerbuilding.com/content/1032/

Meridian DSP6000 digital amp built in! http://www.avguide.com/product/Main_...SP6000/220.jsp

Tetra Realism™ loudspeaker - Acoustic Reality http://www.acoustic-reality.com/Tetra/text3.htm

The Whomp - it achieves a -3db point of 27hz (-10db @ 20hz) http://www.selahaudio.com/whomp.html

Rear-Loaded (Bass) Horns http://melhuish.org/audio/enclosurehornrear.htm

Basic Horn Theory http://melhuish.org/audio/horn.htm

Avantgarde USA home page http://www.avantgardeusa.com/

Avantgarde's bass systems - Subwoofer SUB225 CTRL PRO http://www.avantgardeusa.com/bass.html

Avantgarde DUO Description http://www.avantgardeusa.com/duo.html

ORIS systems around the world http://www.bd-design.com/en-gb/pg_12.html

BD-Design driver manual for Oris horns http://www.bd-design.com/

Horn foldings (many many designs for BASS HORNS) http://www-user.uni-bremen.de/~carni...hornfolds.html

Accuton C² 44/8 midrange driver http://www.speakercity.com/accuton/C2%2044.shtml

German supermen shatter the laws of physics... again! (bass horns) http://db.audioasylum.com/cgi/m.pl?f...rn&r=&session=

Madisound discussion forum http://www.madisound.com/cgi-bin/discuss.cgi

Ultimate tweeters http://ldsg.snippets.org/vendors/scan-spk.php3

Horns (or why I use horns) http://ldsg.snippets.org/HORNS/horns.html

Solid state amps and horns DON'T MIX! http://www.aloha-audio.com/library/Tube_Fest_Talk2.html

RE Designs LNPA-150 monoblock transistor amplifiers http://www.redesignsaudio.com/LNPA150.html

RE Designs LNPA-150 monoblock transistor amplifiers http://www.aloha-audio.com/library/Tube_Fest_Talk2.html

Monarchy SE-100 delux Mono Power Amplifiers $2,358/pr http://www.monarchyaudio.com/SE100-5.htm

Compression driver and horn/lens assembly guidelines: http://ldsg.snippets.org/sect-6.php3#EMINENCE-C

The Ariel - By Lynn Olson A Brief Note about Efficiency http://www.audiokit.it/ITAENG/KitDif...ArielEffic.htm

The Ariel History By Lynn Olson http://www.audiokit.it/ITAENG/KitDif...ielHistory.htm

Do it Yourself Tube Audio - A Glowing Hobby - subwoofer for Ariel http://www.teresaudio.com/haven/

Adire HE10.1 Kosala Speakers Review by Gene H http://www.audioasylum.com/audio/spe...es/109656.html

Horns and High-Efficiency Systems, speaker types...!!! http://www.aloha-audio.com/library/speaker-design1.html

Audio Asylum - search page http://db.audioasylum.com/

Symetrix SymNet™ Audio Matrix is a family of network linkable audio matrix DSP processors http://www.symetrixaudio.com/SymNet_Web/index.htm

HOME THEATER has a new SUBWOOFER LEVIATHON!!!!! Must read! http://www.avsforum.com/avs-vb/showt...ighlight=Bdeap

In Reply to: lab12 vs SHIVA on basshorn - Bdeap bass horns http://www.audioasylum.com/forums/HU...ges/55423.html

Tumult driver, Bdeap sub..... http://www.avsforum.com/avs-vb/showt...ap#post2746806

Gallo Acoustics Due, MPS Speaker System http://www.audiorevolution.com/equip/gallo/

B&W subwoofer - shape http://www.bwspeakers.com/index.cfm/...7F00D0B7473B37

Loudspeaker driver database http://www.thielesmall.com/

Pjay's Speaker building page - driver database http://members.aol.com/_ht_a/pjay99s...eakerhome.html

High sensitivity tweeters http://www.madisound.com/cgi-bin/dis...gi?read=272585

AKG Hearo 999 - headphone amp - center channel effects http://headphone.com/layout.php?topi...tID=0010120999

Headphone site http://www.head-fi.org/

Headphone site http://headphone.com/layout.php?topicID=1

Headphone software http://www.akg.com/products/powersla...nguage,EN.html

Speakers - woofer facing up http://www.blackdahlia.com/samadhi/cbae.htm

World's Most Expensive Hi-Fi System?!! http://www.avsforum.com/avs-vb/showt...hreadid=295441

Crown K2 class D digital amps - subwoofer

Loudspeaker Technology - cubes, spheres, standing waves.................. http://www.norh.com/about/tech/

B-Deap, Servodrive subwoofer http://www.servodrive.com/SPL-bdeap32.html

Balanced vs. Unbalanced Cables http://www.wpi.edu/Academics/Depts/H...bal-unbal.html

Impedance, damping factor myth, balanced vs. unbalanced connections... http://sound.westhost.com/impedanc.htm

DENOMINATIONS ABOVE ONE MILLION - American & British systems http://www.webster.com/mw/table/number.htm

Series vs. Parallel Crossover Networks http://sound.westhost.com/parallel-series.htm#1.3

Audiophile Capacitors http://sound.westhost.com/cables-p5....e%20Capacitors

Speaker design books and reviews http://www.amazon.com/exec/obidos/AS...699345-1453419

Class A amplifiers http://sound.westhost.com/class-a.htm

B&W Nautilus 801 loudspeaker outdoor listening test http://www.tnt-audio.com/casse/bw801e.html

Gershman Acoustics Avant Garde RX-20 reviews http://www.audioreview.com/PRD_119559_1594crx.aspx

Mirage Loudspeakers http://www.miragespeakers.com/omnipolar_tech.shtml

JBL Studio Monitors http://www.proaudiosystems.co.uk/aca...itors_162.html

StealthBoxz - sub enclosure, standing waves... (car sub) http://www.auto-acoustics.co.uk/faq3.htm

Google search - subwoofer internal standing waves http://www.google.com/search?hl=en&l...standing+waves

axial, tangential and oblique standing waves http://www.coincidentspeaker.com/about.htm

Rane PE-17 Five Band Parametric Equalizer - for subwoofer (balanced only) http://www.svsubwoofers.com/ampeq_rane_pe17.htm

Center channel speaker(s) http://www.avsforum.com/avs-vb/showt...47#post1230047

Near field surround system http://www.mkprofessional.com/pdf/mps-422.pdf

Comb filtering effect http://www.asc-hifi.com/acoustic_basics.htm#2

Speakers around TV set - uggghhh... http://www.mkprofessional.com/pdf/mps-422.pdf

spherical and egg shaped loudspeaker enclosures http://www.usenclosure.com/cst-oem.htm

Wiremold power strip http://www.naimusa.com/power.html

Behringer (sp?) DSP 1124 is a great piece of equipment to eq a sub http://www.avsforum.com/avs-vb/showt...hreadid=312010

Tannoy - 3-way nearfield monitors with nearfield elliptical cabinet http://www.pro-music-news.com/html/10/e20401ta.htm

JBL S36II - molded enclosure with Elliptical Oblate Spheroidal waveguide http://www.*******.com/PID_15014.htm

JBL S312II - specifications... http://www.*******.com/PID_15090.htm

Baffle diffraction http://www.t-linespeakers.org/tech/b...tep/index.html

Loudspeaker Diffraction Loss and Compensation http://www.trueaudio.com/st_diff1.htm

Diffraction from baffle edges http://www.linkwitzlab.com/diffraction.htm

Diffraction is a difficult subject........... http://www.linkwitzlab.com/faq.htm#Q8

AudioPrism Noise Sniffer http://www.audioprism.com/noisesniffer.html

Cabinet shape http://www.ellisaudio.com/CabinetShape.htm

Behringer Feedback Destroyer - setup http://www.snapbug.ws/bfd.htm

optimize low frequency acoustic response of rooms through trial and error measurements http://www.etfacoustic.com/demoroom.all.html

Baffle Diffraction Simulator is a design program and education tool http://www.pvconsultants.com/audio/d...ownloadbds.htm

Understanding Cabinet Edge Diffraction http://www.speakerdesign.net/understand.html

an ideal baffle is very large http://audio.sdecnet.com/diy_reflector/

Magneplanar speakers http://www.magnepan.com/

Magnepan MG20.1 vs. B&W Nautilus 801 http://www.epinions.com/content_2418516100

baffle diffraction compensation http://www.ameritech.net/users/kagato/xover1.htm

baffle diffraction compensation - Google http://www.google.com/search?hl=en&i...=Google+Search

Baffle Diffraction Theories and Practice http://www.t-linespeakers.org/tech/b...stepcompo.html

Spherical diffraction compensation http://yu-ra.tripod.com/baffle_diff.htm

crossover - with baffle diffraction loss compensation (CALSOD) http://www.geocities.com/capecanaver.../flrspkrs.html

Developing a DIY speaker inspired by the Wilson Audio X1 SLAMM http://www.cliowin.com/FOTO/gpphoto/Hancock/slamm.htm

Baffle diffraction loss http://yu-ra.tripod.com/index_general.htm

infinite baffle measurements, speakers... http://home.new.rr.com/zaph/audio/audio-speaker13.html

Diffraction - From Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Diffraction

The Thiele-Small Loudspeaker Database - works w/Unibox http://www.thielesmall.com/

The "6dB Response Step", and infinite baffle uniformity... http://www.northcreekmusic.com/NorthCreekKits.html

baffle diffraction compensation - DIY contest http://www.kaiaudio.com/diy2001/kaiopen.html

Baffle Step Equalisation http://sound.westhost.com/bafflestep.htm

Speaker dust cap http://web.mit.edu/2.972/www/reports...r/speaker.html

Speaker dust cap http://web.mit.edu/2.972/www/reports...r/speaker.html

THIEL floor-standing speakers employ a rounded baffle http://www.thielaudio.com/THIEL_Web/...ffraction.html

The Acoustic Benefits of Phase Alignment http://www.wescomponents.com/SSS/set...s_in_a_rec.htm

The Acoustic Benefits of Phase Alignment http://www.wescomponents.com/sss/aco...hase_align.htm

Time aligned, Phase coherent, Phase aligned, Transient accurate, What's up with that? http://www.geocities.com/kreskovs/TimeAligned1.html

Time aligned, Phase coherent, Phase aligned, Transient accurate, What's up with that? http://www.geocities.com/kreskovs/TimeAligned2.html

Time aligned, Phase coherent, Phase aligned.... GLOSSARY http://www.geocities.com/kreskovs/TimeAligned1.html

Time-alignment measurements http://www.silcom.com/~aludwig/Time_alignment.html

Veneering Recessed Driver Cutouts http://www.audiodiycentral.com/nt_drvrcutouts.shtml

Time- and phase-correct performance - 1st order crossovers..... http://www.soundstage.com/video/reve...en_theater.htm

Baffle spacing, phase angles and time alignment, revisited http://www.audioasylum.com/forums/pi...ges/11054.html

spreadsheet for offet drivers/crossovers and phase correction... http://www.d-web.com/dbrown/db61ta/phase.xls

For starters, scrambling the waveform is JUST PLAIN WRONG! http://www.meadowlarkaudio.com/TC4.htm

Speakers with vertical baffles are NOT time coherent ! http://www.meadowlarkaudio.com/TC1.htm#1

Illustration: flat baffle, slanted baffle and point source phase responses http://www.meadowlarkaudio.com/TC1p.htm

Subject: Baffle spacing, time alignment and driver offset http://www.diysubwoofers.org/talksho...ages/33527.htm

Crossover transient response http://www.silcom.com/~aludwig/Sysde...sient_response

ALIGNED DRIVERS? http://members.chello.se/jpo/papers/align/ALIGN.html

drivers time align - GOOGLE SEARCH http://www.google.com/search?hl=en&l...ers+time+align

Subwoofer damping material http://www.diysubwoofers.org/sld/sealed4.htm

The Following is a Discussion on Stuffing a Sealed Enclosure http://www.wmeckle.com/1259/1259.htm

Acousta-stuf @ Parts Express (& damping materials) http://www.partsexpress.com/webpage....ctGroup_ID=137

HyperSonic Sound - focused sound waves http://www.atcsd.com/tl_hss.html

damping baffle panels - with 'Router Pad' http://www.snippets.org/alsr/const.html

Making felt front baffle diffraction pads http://t-3.cc/users/audioworx/page90DIY-FeltPads.html

Felt Rings verses Felt Blocks for Baffle Diffraction Reduction http://www.speakerdesign.net/felt/fe...vs_blocks.html

Reduce front baffle loudspeaker diffraction losses - tweaks http://www.audiotweaks.com/tweaks/tweak_284.htm

Measuring Loudspeakers, Part Three http://www.stereophile.com/showarchives.cgi?103:0

Give it a Tilt! (Tilt your speakers backwards for a new experience!) http://www.echoloft.com/articles/aug2000/tilt.htm

Measuring driver volume - Vs, Vb... http://sound.westhost.com/tsp.htm

driver displacement volume http://www.google.com/search?hl=en&l...acement+volume

driver displacement volume http://www.trueaudio.com/win_abt1.htm

The WinSpeakerz Box Calculators http://www.trueaudio.com/about_4.htm

Avantgarde Trio installations http://www.avantgardeusa.com/installations.html

Room Acoustics http://www.silcom.com/~aludwig/Room_...rrible_optimum

Subwoofer room gain..... http://www.ellisaudio.com/subwoofers.htm

Unibox - Design Your Own Loudspeaker Cabinet http://www.danbbs.dk/~ko/ubtxt.htm

1.0 Introducing The Speaker Design Toolbox http://www.trueaudio.com/about_1.htm...%20WinSpeakerz

Correction Values for Radio Shack SPL Meter http://www.danmarx.org/audioinnovation/rsmeter.html

Rane PE17 Five Band Parametric Equalizer http://www.svsubwoofers.com/ampeq_rane_pe17.htm

parallel & series battery wiring schematics http://www.solarexpert.com/Batteries/batchart.html

Series vs. Parallel Crossover Networks http://sound.westhost.com/parallel-series.htm

SOS - Subwoofer Optimizer System $299.95 each http://www.speakercity.com/Sos/SubwooferOptimizer.shtml

How do you eq your sub? http://www.avsforum.com/avs-vb/showt...0&pagenumber=1

Behringer DEQ2496 Ultra-Curve Pro Mastering Processor (subwoofer) http://www.musiciansfriend.com/srs7/...p?q=ultracurve

Open Baffle Line Array Speakers http://www.geocities.com/dmitrynizh/labaffles.htm

Dipoles/open baffle - Is the "figure-of-eight" radiation better than the "conventional" radiation? http://www.roister.com/eng/faqs.htm

Room acoustics - By far the most uniform response in the range below 200 Hz http://www.linkwitzlab.com/rooms.htm

is obtained with an open-baffle, dipole or figure-of-eight radiating source

The Subwoofer DIY Page v1.1 Dipole Bass Systems http://www.diysubwoofers.org/dipole/

The Contrapunt, a dipole sub woofer. http://www.euronet.nl/users/temagm/audio/dipolesub.htm

Baffle diffraction loss http://yu-ra.tripod.com/index_general.htm

Dipole Bass - Adire Audio DPL-12 drivers http://sho.mystarband.net/BBContent/BBBass.html

2 350 Watt plate amps from Stryke Audio http://stryke.com/amplifiers.html

A Word About Enclosure Filler (sealed subwoofer) http://www.bullysubs.com/design_phil.html

Meyer Sound HD-1 : High Definition Audio Monitor http://www.meyersound.com/products/s...hd-1/index.htm

ELAC Technische Software CARA 2.0 computer program http://www.stereophile.com/showarchives.cgi?438

RPG Diffusor Systems Room Optimizer http://www.rpginc.com/products/roomoptimizer/

RPG Diffusor Systems - CATT-Acoustic v8.0 http://www.catt.se/

RPG® developed the Shape Optimizer http://www.rpginc.com/products/chaos/index.htm

ETF software is a highly accurate PC based acoustic measurement system http://www.acoustisoft.com/

CARA 2.1 PLUS (includes CARA Training CD) http://www.rhintek.com/

CARA - official site http://www.cara.de/ENU/index.html

Updated CHECK OUT the NEW CARA 2.2 http://www.reflexlabs.com/

About Acoustics http://www.reflexlabs.com/page728281.htm

ELAC Technische Software CARA 2.0 computer program review http://www.stereophile.com/showarchives.cgi?438:0

CARA Walkthrough http://www.cara.de/ENU/CARA/index.php?load=box3.html

RPG Room Optimizer http://www.sweetwater.com/store/detail/RoomOptimizer/

The Sound of Quality in Monolithic Domes http://www.monolithic.com/plan_design/sound/index.html

Bouncing Off the Walls Controlling acoustics in a Monolithic Dome http://www.monolithic.com/plan_desig...ics/index.html

Audio Systems Enhance Living Word Bible Church http://www.monolithic.com/gallery/ch...ord/index.html

Test Results Of Acoustics In Monolithic Dome Gyms Delight The Tester http://www.monolithic.com/plan_design/gym_acoustics/

EASE 4.0 - Enhanced Acoustic Simulator for Engineers - $1995 http://www.falconaudiovideo.com/

EASE 4.0 - Enhanced Acoustic Simulator for Engineers http://www.olsonsound.com/EASE/articles.html

EASE 4.0 - Enhanced Acoustic Simulator for Engineers - developer site http://www.auralisation.de/index.html

EASE 4.0 - Takes Off The Limits http://www.ada-acousticdesign.de/eas...out_ease40.htm

ODEON Room Acoustics Modelling Software (dome?) http://www.bksv.com/?ID=2154

Room Acoustics & Sound System Design Links http://www.audioscientific.com/Room_...gn%20Links.htm

JBL Professional software downloads http://www.jblpro.com/pages/software_downloads.htm

room nodes, bass cancellation, EQ... http://www.futuremusic.co.uk/fm_mmus...=6809&PageNo=5

Golden Ratio room setup http://www.audiolinks.nl/speakersetup.htm

Carvin's SX series solid-state guitar amps - John Murphy on tube amps http://www.trueaudio.com/at_eetjlm.htm

WinSpeakerZ "complete" offer, user guide, book, software... http://www.trueaudio.com/catalog1.htm

BassBox Pro - SPHERICAL ENCLOSURES! http://www.ht-audio.com/bassbox.htm

Room interaction - reflections, absorbtion, reverb time, etc http://www.diysubwoofers.org/talksho...ages/34343.htm

Diffraction-Free Sound Waves http://www.aip.org/physnews/graphics/html/yusuke.html

ODEON Room Acoustics Modelling Software - expensive http://helmholtz.oersted.dtu.dk/~odeon//

ODEON Room Acoustics Modelling Software - expensive http://www.bksv.com/?ID=2154

EASE V3.0 http://www.jblpro.com/pages/software/software.htm

Preserving Wanted Sound, room acoustics.... - excellent! http://www.usg.com/Design_Solutions/...preserving.asp

Room Acoustics & Sound System Design Links http://www.audioscientific.com/Room_...gn%20Links.htm

Speak 2.5 - official site - $299.95 http://www.gedlee.com/speak.htm

room acoustics - curved surfaces http://www.google.com/search?hl=en&i...urved+surfaces

Room Acoustics - Design For Listening (curved surfaces...) http://irc.nrc-cnrc.gc.ca/cbd/cbd092e.html

Software links http://members.optusnet.com.au/~audiosoft/sahfsd07.txt

Room acoustics (curved surfaces...) http://www.linkwitzlab.com/rooms.htm

Infinite slope crossovers http://www.josephaudio.com/essay.islope.html

DEQX Digital Calibration Processor/Crossover http://www.deqx.com/pdc26.html

Passive Crossover Designer, free passive crossover design software - http://audio.claub.net/software/jbagby.html

FRD Consortium, more free design and modeling software - http://www.pvconsultants.com/audio/frdgroup.htm

ARTA - a powerful and free loudspeaker measurment suite - http://www.fesb.hr/~mateljan/arta/

I have more links, but this should cover most of what I have that's related to DIY speakers (& crossovers...).

3,557 Posts
HOLY SH#@!!, Ray....nice work!
  • Like
Reactions: jj_0001

5,896 Posts
I'm bookmarking this page until I have time to sort through and categorize those links! Thanks Ray... there are pages there that I've never run across!

This should be a sticky...

342 Posts

Thanks big time. Healthy reading for an education. Definitely a bookmark for future reference.

1,385 Posts
Thanks for all the great compliments!
Also had a lot of positive feedback on my Free killer apps for your HTPC... thread in the Home Theater Computers section here @ AVS (it was put up as a sticky for now).

It also helps to have some software (& hardware for fine tuning), even if you do know most of the technical aspects of speaker building & design & know what drivers, etc... you want to use...

Loudspeaker design manuals, books, software and hardware: hyperlinks moved to my thread below...

I know there should be other good books, links, etc... Of course any members here can contribute their wisdom.

I was even able to dig up (or create) spherical enclosure calculations for free on the web (from math sites). Many of the more expensive software programs can't even do those calcs...

59 Posts
Discussion Starter · #9 ·

I'm speechless. Thank you so much RayL, I'm going to be busy for a long time. That's what I love about this forum, no shortage of people willing to help.

167 Posts

You outdid yourself. A prince you are.


1,385 Posts
Thanks Chris3377 & BOK123!

I'll try to sort them all out a bit more sometime soon, shouldn't be too hard as they're all gathered in a spreadsheet & "halfway" sorted already... I put them in a spreadsheet because my Favorites folder would have been swamped.

BTW Chris3377: the 12dB Linkwitz xover @ 3kHz & tweeter resonance @ about 1kHz should be A LOT better than a 2kHz xover.

6,980 Posts
Conceptually loudspeakers are simple devices. Once you start looking at real accuracy, and taking real, accurate measurments, things get much, much more complicated.

From a simple circuit analysis point of view, a major point overlooked here is that a loudspeaker does not have a simple, resistive impedance. The impedance varies with frequency, and even changes radically depending on the enclosure it is placed in. This is in fact one reason so many DIYers like to go with active crossovers, as you remove the interaction with the impedance of the driver. Similarly, drivers which look pretty on paper, don't measure the same when placed in a real box. If we get even deeper into the details, we see that loudspeakers have some very interesting characteristics with respect to time. While many feel good about physically lining up drivers fore and aft, this is generally wishful thinking, as different drivers actually have internal fixed delay which is then compounded with the behavior of the crossover, making for a situation which requires accurate measurement.

This is not to say that every speaker on the market is designed with all of these factors optimally dealt with, as EVERY design makes some compromise.

I encourage you to start by building some speakers, but then get yourself a microphone and use a measurement system to see what you have created and what you are listening to. There are many inexpensive and even shareware systems out there. For loudspeaker design I would look at WinMLS or Praxis, and start hanging out on some of the loudspeaker design forums.

Regards and good luck,
  • Like
Reactions: Jady Jenkins

1,385 Posts
Thanks Andrikos (I see you're in AZ too)! And thanks to the moderator(s) (Alan Gouger and/or David Bott I would presume)! I really appreciate the compliments!

3,801 Posts
Back on the original topic....
(I) have chosen to go with GR-research drivers all around

In that case, the choice is simple. Buy one of Danny's kits. They are well engineered, thoroughly tested and praised by a number of people. They use good components and won't cost any more than buying the components separately. There's no way you will get as good results buying a "generic" crossover. The reasons for that are mostly explained in Vance's book if you read it carefully. The alternative is to buy measurement gear and simulation software and plan on spending months (years?) refining your own design. That's a fun hobby but it's expensive and time consuming, not for someone who just wants a good pair of speakers.

1,385 Posts

Originally posted by catapult
The alternative is to buy measurement gear and simulation software and plan on spending months (years?) refining your own design. That's a fun hobby but it's expensive and time consuming, not for someone who just wants a good pair of speakers.

GR-Research has to make pretty good drivers, especially for the money as the LDSG site also recommends them.

It could take forever refining one's own design, no matter what they put together - unless they have the proper room or area to put them in (e.g. new house time, & equalization or DRC only gets them so far). Then again some very talented musicians seem content with a boombox or "in a van down by the river" system...

Driver selection also seems to be a big part of the equation. The pros all seem to agree compromises must be made - I've seen sites on post grad work tackling it like "rocket science". If one doesn't have good wide range drivers that "compliment" each other, it can easily become so. Not to say driver selection is easy, I've spent many hours making a spreadsheet for that (from tweeters to subwoofers).

I now have hyperlinks for Loudspeaker design software and hardware:

True Audio 'Introduction to Loudspeaker Design" by John L Murphy $24.95 http://www.trueaudio.com/ild_abt1.htm

Vance Dickason's Loudspeaker Recipes Vol. 1 $24.95 http://www.amazon.com/exec/obidos/tg...glance&s=books

Vance Dickason's Loudspeaker Design Cookbook 6th Ed. $39.95 http://www.amazon.com/exec/obidos/tg...glance&s=books

Master Handbook of Acoustics - F. Alton Everest $27.97 http://www.amazon.com/exec/obidos/tg...10240?v=glance

David Weems' Designing/Buidling Speaker Systems 4th Ed $13.97 http://www.amazon.com/exec/obidos/tg...glance&s=books

David Weems' Great Sound Stereo Speaker Manual w/CD-ROM $24.47 http://www.amazon.com/exec/obidos/se...267016-9510240

Theory and Design of Loudspeaker Enclosures - J. E. Benson (out of print) http://www.amazon.com/exec/obidos/tg...10240?v=glance

Unibox free http://www.danbbs.dk/~ko/ubtxt.htm

WinISD Pro, 0.4X free http://www.linearteam.org/winisd.html

Martin J. King's MathCAD models (Quarter Wavelength Loudspeaker Design) free http://www.quarter-wave.com/

Speaker Workshop free http://www.speakerworkshop.com/

WinMLS2000 - loudspeaker measurement $39.00 http://www.winmls.com/

SoundEasy V8.0, EasyLab, BoxCad 4.0 $225.00 http://www.interdomain.net.au/~bodzio/

True Audio WinSpeakerz $129.00 http://www.trueaudio.com/win_abt1.htm

True Audio TrueRTA Level 4 $99.95 http://www.trueaudio.com/

LspCAD, justMLS $129.00 http://www.ijdata.com/

LspCAD PRO, justMLS $495.00 http://www.ijdata.com/

BassBox & Xover Pro Version 6 (w/spherical design) $199.00 http://www.ht-audio.com/xoverpro.htm

GedLee LLC Speak 2.5 (w/spherical design, baffle diffraction) $299.95 http://www.gedlee.com/speak.htm

PureBits Sample Champion Light $99.00 http://www.purebits.com/scoverview.html

PureBits Sample Champion Pro $299.00 http://www.purebits.com/scoverview.html

PureBits Sample Champion - Impedance and Thiele Small Plugin $29.00 http://www.purebits.com/scplugins.html#anc#6

PureBits Sample Champion Pro + all Plugins Bundle http://www.purebits.com/order.html

SpectraPLUS 3.32 http://www.cetaceanresearch.com/analysis.html

SpectraPRO 3.32 http://www.cetaceanresearch.com/analysis.html

SpectraLAB 4.32 http://www.cetaceanresearch.com/analysis.html

HobbyBox V.5 (German site)

CLIOWin Lite with PCI card, signal Conditioner, and Mitey Mike II $749.00 http://www.cliowin.com/tour1.htm

LoudSpeaker LAB 2 with measurement box $310.00 http://hem.passagen.se/johnygre/ENG/main.htm

LoudSpeaker LAB 2 with measurement box including a calibrated microphone $400.00 http://hem.passagen.se/johnygre/ENG/main.htm

Liberty Instruments - Praxis, AudPod measurements, Girardin mic (also LspCAD) http://www.libinst.com/

LinearX Systems LMS - Loudspeaker Measurement System $1,395.00 http://www.linearx.com/products/ProductsTop.htm

LinearX Systems Leap5 enclosure and crossover design modules $1,490.00 http://www.linearx.com/products/ProductsTop.htm

LinearX Systems Leap5 EnclosureShop $795.00 http://www.linearx.com/products/ProductsTop.htm

LinearX Systems Leap5 Crossover Shop $795.00 http://www.linearx.com/products/ProductsTop.htm

EASE 4.0 - Enhanced Acoustic Simulator for Engineers $1,995.00 http://www.ada-acousticdesign.de/eas...out_ease40.htm

CARA 2.2 Plus, Training CD, Audio Test CD $74.95 http://www.visaton.com/cgi/VisatonFr...Artikel_ID=683

RPG Diffusor Systems Room Optimizer $99.99 http://www.rpginc.com/products/roomoptimizer/index.htm

RPG Diffusor Systems - CATT-Acoustic v8.0 http://www.rpginc.com/products/catt/

CATT-Acoustic v8.0 http://www.catt.se/

ODEON Room Acoustics Modelling Software - expensive http://www.dat.dtu.dk/~odeon/products.htm

3,444 Posts
Theory is nice. Knowledge is power. Good components are important.

But trying to design and construct a good loudspeaker system from scratch without a competent measurement system is like asking Leonardo to paint the Mona Lisa with a blindfold on.

Liberty Audio has everything you need, for not much money.

1,385 Posts
PrimeTime - great recommendation.
Liberty Instruments Praxis is also available a a free "no strings" download - outside of getting the measuring equipment.

1,385 Posts
Gladiator, I just alphabetized the list in my spreadsheet and the links you gave were not in there. Thanks!

Interesting, the 1st link mentioned 120 dB/octave crossovers - What is an Infinite Slope Crossover? . I've heard of 48, 52, 99 dB/octave in an active crossover system - but this one is passive somehow.

I'll add them in, I also have a lot more links but want to get them in order before I edit the list.

403 Posts
I worked with digital filters that essentially went from 0 dB to silent (or the digital precision floor) in a couple of Hz. The main advantage is in off-axis frequency response (the drivers can essentially be considered as independent)


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