AudioJosh's horns & things measurement thread - AVS Forum
Forum Jump: 
 
Thread Tools
Old 05-26-2014, 08:49 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
I am working on designing a large 2 channel audio multi-horn based system. I also have intentions to build other speakers after that will likely employ my big SEOS18s. The thing is, when it comes to audio, its one of the things I do spend money on, its my hobby, so over the years I have amassed a small collection of drivers, horns and woofers. I thought I would start a thread of my journey in putting together at least the first system, but in the process I plan to measure a LOT of horns/drivers, more than what I have planned for the aforementioned system. I figure this is as good of a place to keep a virtual notebook as any.

* warning, I move at a glacial pace as I tend to have an active social life (38 and single) outside of a demanding job. So this thread will get updated in bits and spurts as I have time.

Bit of background:
I've been into the hi-fi scene since I was 24 or thereabouts and into DIY since I was 26. (I go by JoshK on most other audio sites, but it was taken here) I have built tube amps, preamps, cables and a few speakers that I didn't design. My education was in statistics, math and smidge of physics, so I took a liking to the theory of audio. I have Dr. Geddes to thank for pulling me into higher efficiency designs and focusing my attention on the things that matter. I have been to his house and heard his setup (amazing) and I have also met Dave Slagle and some of the former New York Triode Mafia crew. [I'm not a die-hard when it comes to tubes vs SS, vinyl vs CD, etc, but I do think good tube amps sound very satisfying, but not all of them...and I have a lot of fun learning and designing them.] This horn system is intended to be run off my Thomas Mayer built 211 monoblocks, at least from the lower horn up.

I have read a lot about speaker design, measurements, acoustical theory and crossover design throughout the years but have yet to do any measurements/designs myself. So here goes a grand maiden voyage on a not-so-simple design. I will learn through this and employ the help of the knowledgeable folks here.
End of background:

The measurement equipment that I have at my disposal:
measurement gear:
1) Omnimic V1 (updated the software)
3) Earthworks M30
4) Focusrite Scarlett 6i6 (was on ARTA's tested list)
software:
1) Soundeasy
2) ARTA
3) HOLM acoustics
4) REW
Other hardware:
2) Dayton Audio DTA-120 Class T Digital Mini Amplifier 60 WPC
6) MiniDSP 4x10 (intended to prototype the crossover)
7) ATI 1504 (for use with above, but already had it)

I am still figuring out the connection setup for using laptop + Focusrite + ARTA + M30 + DTA-120 + test speaker. Think I have it figured out, but may need to confirm (the loopback part).

Stuff to measure:
Bass:
1) AE TD15X in 5cuft box with dual 1400gm PR
2) 6x JBL 2226H in no box as of yet
midbass:
3) AE TD15M
4) AE TD12M
5) 140hz LeCleach mahogany horns with 4" throat, 38" mouth (>100lb ea iirc). Three candidate drivers:
  1. Faital M5N12-80 http://www.usspeaker.com/faital%20pro%20m5n12-80-1.htm (JLH was using on 135hz Tractrix horns to good effect)
  2. FANE Studio 8M (I'll need to make a backchamber for this one, so it'll be a while before I can measure.
  3. JBL CMCD-82H (likely my choice). Got the drivers but the phase plugs are backordered, so I'm waiting.
mids:
6) Iwata 300hz, my only 2" horn, two candidate drivers:
  1. Community M200A (this is what Avantgarde used, at least originally. These have the harder to find A diaphragm that avoiding a nasty breakup) They are huge and intended to be used from 400-4k.
  2. Radian PB950Be-8
7) Custom made (my design) 21" diameter OS with LeCleach style mouth rollback, made of mahogany at the same time as the big ones. All came from Jeffrey Jackson of Elevenhorns. 1.4" throat
8) 600hz high flare LeCleach horns in mahogany (11horns too), 1.4" throat.
  1. Eighteen Sound 1460A -8
  2. Radian 745NDBe-16
9) SEOS18
  1. Radian 475Be (yes I know, that is a lot of Be)
  2. Only 1 B&C DE250 that I can locate, but can use to compare
tweeters:
10) Beyma TPL-150H
11) Fostex T945 (these are alnico, meant to be a big upgrade to the JBL 2405 they competed against)
12) B&C DE35 (some say this is just as good as the super high dollar super tweeters, but it costs a lot less)

I think that about covers the list, at least for now. I think I have some other drivers that aren't as relevant. For the record, this will likely be at least three systems and I don't plan to keep them all, but the experience of building and comparing the various trade offs I find intellectually stimulating.

JoshK on most other audio forums
AudioJosh is offline  
Sponsored Links
Advertisement
 
Old 05-26-2014, 08:50 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Since everybody like pictures, I start with a couple.

Bassbins I made some years back when I had a wood shop:
CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 65
with an Iwata 300 seated atop.
CREATOR: gd-jpeg v1.0 (using IJG JPEG v62), quality = 85

The big 140hz horns
CREATOR: gd-jpeg v1.0 (using IJG JPEG v80), quality = 95




The custom OS waveguides
CREATOR: gd-jpeg v1.0 (using IJG JPEG v80), quality = 95
CREATOR: gd-jpeg v1.0 (using IJG JPEG v80), quality = 95


one with the SEOS18 atop my bassbins

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 08:50 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Tweeter pics
The Fostex T945N

B&C DE35


Radian 745NEOBePB
radian-760neopb-size185.gif

Radian 950BePB
radian-950Bepb-size200.gif

Radian 475BePB (I think I'm officially a shareholder now)
radian-475pd-size161.gif

AE TD15M
thumbnail-TD15M-front.png

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 08:50 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
reserved for stuff

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 09:11 AM
AVS Special Member
 
tuxedocivic's Avatar
 
Join Date: Feb 2010
Location: Ladysmith, BC
Posts: 5,176
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
Quoted: 620 Post(s)
Liked: 700
WOW! Sweet man. This is really nuts. Looking forward to seeing what your custom design can do. And the Iwata 300. Very nice.
tuxedocivic is online now  
Old 05-26-2014, 09:17 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Thanks, for the big horns, the biggest challenge is coming up with stands to hold it all where it is suppose to go (see Romy the Cat's system for example). I bought a welder (needed for my Jeep hobby anyway) and plan to make stands. Jeffrey did that for his 140hz horns.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 09:29 AM
AVS Special Member
 
tuxedocivic's Avatar
 
Join Date: Feb 2010
Location: Ladysmith, BC
Posts: 5,176
Mentioned: 13 Post(s)
Tagged: 1 Thread(s)
Quoted: 620 Post(s)
Liked: 700
I was thinking that. The Iwata doesn't look that hard to mount. But your custom waveguide looks big AND heavy! Hanging from the ceiling?? biggrin.gif

It's been a while since I've been to Romy's site. He's a little out there cool.gif
tuxedocivic is online now  
Old 05-26-2014, 12:10 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
We'll the big 140hz horn I intend to put on the floor, bass bins to the sides, so the other horns will be above which makes them about right for ear level give or take a bit. Jeffrey hung the 140hz horns in his take (this is another person's picture).


zheka and GizzeGutten like this.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 12:42 PM
AVS Special Member
 
augerpro's Avatar
 
Join Date: Aug 2005
Location: Denver, Colorado
Posts: 1,726
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)
Liked: 29
Curious to see the 18 Sound 1460A on teh LeCleach. Do you have pics of the LeCleach?
augerpro is offline  
Old 05-26-2014, 03:11 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
I don't have the 600LC horns on my person yet. I just grabbed a pair off of Jeffrey who had extras.

http://www.elevenhorns.com/600LC.htm



I think this will be a very interesting comparison as well, between the 21" mouth OS and the 600hz LC, both of which should have similar bandpass but one CD versus the other not, but has high flare like an OS.

BTW, your measurement site is still very useful to me and an inspiration for these measurements.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 08:38 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
hommage where it is due.... http://www.itishifi.com/

Pictures are quasi-NSFW....because of the drool from audioporn and hi-fi porn. Just in case you don't believe me.



While I am at it, here are a couple of other seriously cool blogs if you don't know them already.

Thomas Mayer (Vinylsavor) for whom my delicicious 211 monoblocks hail.
http://vinylsavor.blogspot.ca/

My friend/virtual friends' site (related to EMIA, elevenhorns, etc).
http://hifiheroin.blogspot.ca/

I am not affiliated with any of them, just have a lot of respect grown through the years. My study of tube designs pushed me to Thomas Mayer and Dave Slagle.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-26-2014, 08:59 PM
Advanced Member
 
bwaslo's Avatar
 
Join Date: Jul 2006
Location: Portland, Oregon
Posts: 844
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Liked: 94
Josh,

You might want to use a different amp for your measurements. The DTA-120 is a nice amp, but one problem with T-Amps is that their response at high frequencies changes a fair bit with the speaker impedance. Which is ok if you're designing a speaker to use with that amp (it gets compensated from measurements using it), but if you design with a T-Amp and switch to something with more HF damping factor you might find your highs varying.

DIY Synergy horn spreadsheet http://libinst.com/SynergyCalc/
XSim -free crossover designer and simulator http://libinst.com/Xsim/XSimSetup.exe
bwaslo is offline  
Old 05-26-2014, 09:39 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Good point, although it is convenient for the size....I can try the ATI 1504 in its place, not convenient to move around (weighs like a brick).

JoshK on most other audio forums
AudioJosh is offline  
Old 05-27-2014, 06:37 AM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 174
I can't wait to see this thread really take off when you start taking measurements! I must admit that I am not familiar with most of those drivers and horns, but, I am curious about the Seos-18's and Radian stuff that you are planning to try out.

Oh and nice to see another Jeep junky here as well! I have an old CJ7 that I am building with a Dana 44 front and a Dana 60 rear, with a Chevy 350 and a nice set of springs for clearing 35's!
AudioJosh likes this.
Martycool007 is offline  
Old 05-27-2014, 07:15 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
I'll get to measuring before too long. I just need to figure out the best way to get the most accurate measurements then I'll start on a tear.

The OS waveguide + 18 Sound 1460A is the one I want to see the most as there are simulated and measured results at least for the others. Mounting it up so I can measure it itself is a bit of a challenge as it has a very awkward weight distribution.

I just got this jeep from my Dad who was into Jeepin last November. I put some metalcloak fenders on it and am putting a light bar. It has front ARB air lockers and rear detroit lockers on Dana 44s with 4.56 gears and 1.5" BL and 2.5" SL. I am debating selling the 33s (<1000mi) and putting 35s on it. With the metalcloak fenders it has more than enough clearance.
pokeme likes this.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-27-2014, 08:26 AM
Advanced Member
 
JohnDean's Avatar
 
Join Date: Jul 2012
Location: Franklin, TN
Posts: 568
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 105 Post(s)
Liked: 62
Love the big horns. I want some just to have.

Jeeps....I had one once, then it turned into a money stealing monster that makes audio look cheap. Coilovers, beadlocks, Dana 60&70, etc. The only thing left from the Jeep is the VIN, hood and grill. It's more addictive than this hobby.
JohnDean is online now  
Old 05-28-2014, 09:10 AM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 174
Josh, what is the purpose of the big 140hz horn, is it best used with a 5" mid like you linked above? I would imagine that it would take a larger driver to take advantage of the low end capability of the horn. What type of driver would be optimal for this horn and where would you cross it? Would it not be best used in a 2-way configuration with a CD that is able to play to 700hz or perhaps 1000hz?
Martycool007 is offline  
Old 05-28-2014, 09:37 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Think Avantgarde trio. The advantage of the big horn is to be horn loaded all the way down low (~200-300hz on up). This covers the whole human vocal range. If you ask any horn aficionado they will tell you that this advantage is real and that direct radiators just don't compare to the realism. I don't really know, as I haven't heard such a system yet.

The bandwidth of the 140hz horn will likely be 250-700hz or so depending on which upper horn I use.

My plans were based a lot on JLH's experience with his 135hz Tractrix (very similar profile in this case). He is the one that found that Faital mid was really good, even compared to the FANE Studio 8M. I then got curious about the JBL CMCD because of good reports plus the integrated phase plug. Essentially all these are working as quasi compression drivers down lower. You are getting acoustic loading down to the Fc.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-28-2014, 11:52 AM
AVS Addicted Member
 
noah katz's Avatar
 
Join Date: Apr 1999
Location: Mountain View, CA USA
Posts: 20,833
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 432 Post(s)
Liked: 196
Quote:
Originally Posted by Martycool007 View Post

Josh, what is the purpose of the big 140hz horn, is it best used with a 5" mid like you linked above? I would imagine that it would take a larger driver to take advantage of the low end capability of the horn.

A horn-loaded 5" driver is equivalent to a much larger direct radiator.

Noah
noah katz is offline  
Old 05-28-2014, 12:15 PM
AVS Club Gold
 
AV Science Sales 5's Avatar
 
Join Date: Sep 2011
Location: A beautiful view of a lake
Posts: 8,845
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 980 Post(s)
Liked: 609
Looking forward to the measurements of the Beyma TPL-150H. smile.gif

Mike Garrett, AV Science Sales Call Me: 585-671-2968
Email Me: Mike@AVScience.com
Brands we sell: http://avscience.com/brands/ 
Call for B-stock projectors
Stewart, Seymour, SE, SI, Falcon, DNP & more.
RBH, Martin Logan, Triad, Atlantic Tech., MK Sound, BG Radia, SVS & Def Tech, Denon, Marantz & Yamaha .
AV Science Sales 5 is online now  
Old 05-28-2014, 02:15 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Right now the hold up is the cables. The Focusrite has those annoying pro-audio only connectors whereas my amp has RCAs. I thought I ordered the right cables, but they were wrong.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-28-2014, 04:32 PM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 174
Where did you get those large, spherical 140hz horns? Those look wonderful and would most likely sound wonderful as well! I can't imagine what it would be like to have a system capable of horn loading the low mid frequencies that low!
Martycool007 is offline  
Old 05-29-2014, 07:59 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Well Jeffrey Jackson ( as in EMIA (him and Dave Slagle), Experience Music, Eleven Horns, HiFi Herion blog, http://www.jeffreywjackson.com/) had a gig going called Eleven horns that offered Mahogany turned horns from the Philippines. He partnered with Victor Sierra who had formerly worked with another wood horn builder but was currently working for some furniture company in the Philippines. Victor's company did the wood turning and Jeffrey marketed them in the states.

I was part of the first wave of orders (I think there was only one) and all the horns shipped by boat to the states. Jeffrey personally delivered mine (he was living in Tenn at the time, I was in NYC area) when he came to visit Dave in NY.

The problem occurred when all the horns acclimated to the much drier climate in the states versus the Philippine, the lamination of the various pieces started to separate or split, customers were upset but Victor went silent and didn't take any responsibility. Jeffrey was stuck, so Elevenhorns hadn't made any horns since.

My horns have a bit of separation (mostly around the mouth edges) and a tiny bit of cracking. Mostly this is just a cosmetic thing and came easily be fixed with glue/sawdust or wood putty and doesn't affect the function at all. I wasn't too upset to be honest, disappointed a bit, but I was planning to dye (aniline dye) the horns to match my bass bins anyway (see second post) so, I'd just do it then. I'd put some crystalac over the finish when done to permanently seal it. But after the first couple months when it cracked/separated, no further cracks happened at it fully acclimated.

I am no expert in woodworking, but I think the problem really boiled down to a combination of a cheap glue relative to the mass of the wood being joined and insufficient drying of the woof beforehand. Note, the OS waveguides which are only 21" in diameter don't have any separation or cracking, just the big boys.

Jeffrey it looks like according to his blog has since developed a method of building petal horns in the medium size (~300hz by eyeball). So elevenhorns is likely not shuttered.

If you want to see other speakers using "midbass horns" look to Romy the Cat's (goodsoundclub.com) speakers and others on that forum who followed suit. DIYaudio has a big thread on midbass horns with various DIYers who have done various methods. Commercial examples are very expensive. Avantgarde Trio, Sadurni Acoustics, and a few others.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-29-2014, 08:14 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
One other thing worth mentioning. This big horn system is a dedicated two channel audio system. I have a separate system (DSL SM60F) for HT. Thus really loud special effects considerations are not a consideration, only music. I run the horns off of tube amps and have a relatively decent turntable and lot of vinyl. So all in all very different goals than most speakers on this forum, but I still see some overlaps, hence I posted here as well.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-30-2014, 09:17 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Cause I like visuals too, here are commercial speakers for design inspiration:

Avantgarde Trios ($68-160K depending on woofer choice)


Cessaro Gamma ($250K)


Sadurni Acoustics (~$40K base price)


Musique Concrete - La Grande Castine (~$100K)


Tune Audio Anima (32K Euros) slightly cheating with the midbass horn IMHO

JoshK on most other audio forums
AudioJosh is offline  
Old 05-30-2014, 09:34 PM
Advanced Member
 
bwaslo's Avatar
 
Join Date: Jul 2006
Location: Portland, Oregon
Posts: 844
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Liked: 94
I generally like pictures of horn setups, but that Cessaro speaker looks just stunningly ugly to me.
It looks like something by PlaySkool inpired by something from the Terminator.

DIY Synergy horn spreadsheet http://libinst.com/SynergyCalc/
XSim -free crossover designer and simulator http://libinst.com/Xsim/XSimSetup.exe
bwaslo is offline  
Old 05-30-2014, 09:40 PM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Its the most expensive as well. I think the ugliness has a lot to do with the stand design. I don't like the color scheme of the linked photo either....hideous. I've see other versions that were better (all wood iirc). I do like the general layout of horns, which is what I was linking it in for.

BTW, I plan to start on the measurements tomorrow. Starting with 18Sound 1460A + OS horns. Then probably Iwata 300hz and my bass bins...as I'd like to get something setup soon.
pokeme likes this.

JoshK on most other audio forums
AudioJosh is offline  
Old 05-31-2014, 05:20 AM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 174
I am curious to know if there are any companies out there who sell/build horns of this size, particularly horns that can hold pattern control down to 300hz, or lower, to the DIY market?
Martycool007 is offline  
Old 05-31-2014, 05:23 AM
AVS Special Member
 
Martycool007's Avatar
 
Join Date: Jun 2011
Posts: 3,692
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked: 174
Quote:
Originally Posted by AudioJosh View Post

Its the most expensive as well. I think the ugliness has a lot to do with the stand design. I don't like the color scheme of the linked photo either....hideous. I've see other versions that were better (all wood iirc). I do like the general layout of horns, which is what I was linking it in for.

BTW, I plan to start on the measurements tomorrow. Starting with 18Sound 1460A + OS horns. Then probably Iwata 300hz and my bass bins...as I'd like to get something setup soon.

Josh, which iWata horn will you be using? I have been looking at their horns offered on the DIYSG website, and am intrigued by some of these beautiful looking horns!
Martycool007 is offline  
Old 05-31-2014, 08:33 AM - Thread Starter
Advanced Member
 
AudioJosh's Avatar
 
Join Date: Apr 2003
Location: Toronto
Posts: 536
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 68
Quote:
Originally Posted by Martycool007 View Post

I am curious to know if there are any companies out there who sell/build horns of this size, particularly horns that can hold pattern control down to 300hz, or lower, to the DIY market?

They are scarce. There are some, such as DIYSG that uses Autotech from poland. There is http://www.azurahorn.com/ in Australia that makes LeCleach horns. There is Jeffrey Jackson that I think will be bringing back the wood LeCleach style petal horn. There are a few who make radial style horns (TAD like) and a guy or two who make wooden Altec replicas.

What part of pattern to 300hz are you after? Acoustic loading or constant directivity. The later isn't possible to 300hz in a small room for all practical purposes, but the prior is. Careful directivity matching will be a goal in my case to get the directivity to have a nice smooth transition from controlled to omni.

You want horns as big as mine 140hz? That is more a DIY effort, as noone who offered to bring to DIY market has had longevity doing so.

JoshK on most other audio forums
AudioJosh is offline  
 
Thread Tools


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off