How to extend the high pass filter below 20hz in DCX2496 - Page 3 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 74Likes
Reply
 
Thread Tools
post #61 of 203 Old 09-11-2014, 05:00 PM
AVS Forum Addicted Member
 
Archaea's Avatar
 
Join Date: Apr 2004
Location: Kansas City, MO
Posts: 11,416
Mentioned: 647 Post(s)
Tagged: 2 Thread(s)
Quoted: 4045 Post(s)
Liked: 3847
@LTD02 or some other eq master

bump for previous posts question. If it's not an answer anyone knows then I'll pull out the omnimic and measure...

Also what is the math as to what specific hz you are making the HPF? For instance. If I cut 9dB with the HS12 instead of 4 with the iNuke? You gave the answer at 16hz for -4dB cut and 10hz for -12dB cut. How is that figured?

Guess I shouldn't be so lazy and just check it myself with the omnimic --- though ----- it sure is more fun to watch a movie than listen to sine sweeps in my limited free times.

Archaea's 9.12.4 Home Theater Room
(13) JBL CBT 70j-1 | (8) Ultimax UM18-22 sealed subwoofers | (4) MB Quart 12" subwoofers mounted directly to Berkline theater chairs BOSS style | Denon x7200wa AVR | Epson 5040UB Projector | Jamestown 144", 2.35:1 AT screen w/ Seymour XD fabric
Archaea is online now  
Sponsored Links
Advertisement
 
post #62 of 203 Old 09-11-2014, 05:32 PM - Thread Starter
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,275
Mentioned: 888 Post(s)
Tagged: 1 Thread(s)
Quoted: 2998 Post(s)
Liked: 3745
the dynamic eq that you appear to be running seems like it would just give a little bit of boost at lower volumes...not really make significant changes at the higher power levels, so my first thought is 'no' additional modifications for that would be necessary.

Listen. It's All Good.
LTD02 is offline  
post #63 of 203 Old 09-11-2014, 05:43 PM - Thread Starter
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,275
Mentioned: 888 Post(s)
Tagged: 1 Thread(s)
Quoted: 2998 Post(s)
Liked: 3745
i actually forget which way the attack and release work for the dynamic eq at the moment.


for some reason, I'm thinking that in the case of a boost filter, "attack" is the amount of time that the signal is allowed to fall BELOW the threshold before it is boosted.
kind of the reverse of the way a limiter works.
as you know the manual is useless on this one.
for the dynamic eq, setting attack to something very short duration (like zero) and the release to something very long duration (like max) is likely to provide the kind of filtering you are looking for.

Listen. It's All Good.
LTD02 is offline  
Sponsored Links
Advertisement
 
post #64 of 203 Old 09-11-2014, 05:49 PM - Thread Starter
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,275
Mentioned: 888 Post(s)
Tagged: 1 Thread(s)
Quoted: 2998 Post(s)
Liked: 3745
"Also what is the math as to what specific hz you are making the HPF?"


that one is MUCH easier. the protective high pass filter used is 12db/oct. it just so happens that 20hz to 10hz is one octave, so the high pass knocks out 12db of spl (more or less) from 20 down to 10hz. so, each 1db of negative gain will push the filter lower by about 1hz. 12db of negative gain will push it down to exactly 10hz, not counting the natural rolloff of the electronics, which i think is about 1-2db at 10hz in the inukes.


so just to be clear.
20hz 2nd order highpass, no negative gain, -3db point is 20hz.
20hz 2nd order highpass, 4db negative gian, -3db point is about 16hz.
20hz 2nd order highpass, 7db negative gain, -3db point is 13hz.
20hz 2nd order highpass, 12db negative gain, -3db point is about 10hz (maybe 11hz because of the additional rolloff of the electronics even with no filter in place)
Archaea and biga6761 like this.

Listen. It's All Good.
LTD02 is offline  
post #65 of 203 Old 09-19-2014, 11:55 AM
Advanced Member
 
BrickTop's Avatar
 
Join Date: Sep 2002
Location: Munroe Falls, Ohio
Posts: 643
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked: 33
It appears one can apply a full 48db slope high pass, though it uses 4 filters to reduce the frequency to the desired value. If the filter graphs in the Behringer SW are correct, one would have to use additional filters to raise the overall gain back to normal, burning through the rest of the filters, at least if a 10 hz corner is what your shooting for. Since the limits of the gain are 15, you would likely be left with 2 filters for peq.
BrickTop is offline  
post #66 of 203 Old 09-19-2014, 12:06 PM
Advanced Member
 
kingpin111's Avatar
 
Join Date: Jan 2006
Location: Saskatoon, Saskatchewan CANADA
Posts: 980
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 298 Post(s)
Liked: 289
Alright time for another dumb question by yours truly.

Are there not units like this where they go down to 10hz or 5 hz?
kingpin111 is offline  
post #67 of 203 Old 09-19-2014, 03:53 PM
Advanced Member
 
BrickTop's Avatar
 
Join Date: Sep 2002
Location: Munroe Falls, Ohio
Posts: 643
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 48 Post(s)
Liked: 33
There's the MiniDSP which has filter capability to 10 Hz. To me it seems that to add another box with the ability to be over-driven or not drive pro amps enough is not worth the hassle. Then again, I have the unbalanced version because I was going to stick with consumer amps. I know of no other that can go that low that is readily available and as cost effective as the iNukes.
BrickTop is offline  
post #68 of 203 Old 09-26-2014, 02:39 PM
AVS Forum Special Member
 
Reefdvr27's Avatar
 
Join Date: Dec 2009
Location: Cape May, NJ (South Jersey)
Posts: 4,370
Mentioned: 55 Post(s)
Tagged: 0 Thread(s)
Quoted: 1598 Post(s)
Liked: 1088
Quote:
Originally Posted by LTD02 View Post
The DCX2496 only allows for corner frequencies down to 20hz, but many folks could use a high pass feature below that point. This is easily accomplished using a combination of a 20hz high pass filter and a negative gain high shelf filter.

Here is how it works illustrated in WinISD (divide the frequency scale by 10).

The green line is the target curve--a 2nd order high pass filter at 10hz.

Step 1: The red line is a 2nd order high pass filter at 20hz. Enter this in the DCX.

Step 2: The yellow line is a 12db/octave high shelf filter with negative gain of -12db also at 20hz. Enter this in the DCX.

Step 3: You're done. When these two filters are combined, they produce the target curve.

If you need a different high pass point, just adjust how many db of gain are in the shelf filter. For example, a setting of -6db should provide a high pass filter at around 14hz.



Step 1 detail.



Step 2 detail.




Update:

Many have asked how to set this up in the iNuke DSP. The filters are the same.

Here is an example of how to set the filters for a i would suggest a 2nd order 16hz high pass filter.

iNuke can't set filters below 20hz, but that is no problem. We just start with one at 20hz, then add a little shelf to push it down to 16hz.

Here is exactly what to put into the iNuke DSP.

Step 1: On the FILTER tab, enter 2nd order High-pass filter at 20hz (Butterworth, 12db / octave)



Step 2: On the PARAMETRIC EQ tab, enter Filter 1, Gain -4db, Frequency 20hz, type: HS12



Then use filters 2, 3, 4, etc. for any other EQ that you wish to add (e.g., to help correct for room modes).

To set their filter lower than 16hz, just add more "negative gain" in step 2. If adding a total of -12db negative gain, the 20hz high pass will be pushed all the way down to 10hz.
Thanks for posting this!!
Reefdvr27 is offline  
post #69 of 203 Old 09-26-2014, 03:49 PM
Bass Enabler
 
Scott Simonian's Avatar
 
Join Date: Oct 2001
Location: Clovis, CA
Posts: 21,509
Mentioned: 204 Post(s)
Tagged: 0 Thread(s)
Quoted: 5986 Post(s)
Liked: 5117
Quote:
Originally Posted by kingpin111 View Post
Alright time for another dumb question by yours truly.

Are there not units like this where they go down to 10hz or 5 hz?
Nope. Just the MiniDSP but that has it's own set of issues.
kingpin111 likes this.
Scott Simonian is offline  
post #70 of 203 Old 09-26-2014, 11:26 PM
Senior Member
 
sslv2pwned's Avatar
 
Join Date: Apr 2012
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 37
Is there value in doing this with sealed subs?

Sent from my Nexus 7 using Tapatalk
sslv2pwned is offline  
post #71 of 203 Old 09-27-2014, 01:41 AM - Thread Starter
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,275
Mentioned: 888 Post(s)
Tagged: 1 Thread(s)
Quoted: 2998 Post(s)
Liked: 3745
not really. most sealed subs don't require a protective high pass filter. if for some reason someone wanted to run one, it could work though. perhaps as a protective mechanism for an infinite baffle setup where the owner concluded that trading off some single digits for overall greater spl was warranted and had no other way of limiting driver excursion.

Listen. It's All Good.
LTD02 is offline  
post #72 of 203 Old 10-01-2014, 10:51 AM
AVS Forum Addicted Member
 
noah katz's Avatar
 
Join Date: Apr 1999
Location: Mountain View, CA USA
Posts: 23,270
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 2271 Post(s)
Liked: 833
Quote:
Originally Posted by sslv2pwned View Post
Is there value in doing this with sealed subs?
With sealed you don't have to worry about the potential catastrophe facong ported and tapped horns, but removing ULF will increase SPL capability and reduce the chance of clipping the amp.
LTD02 and V.X.Donique like this.

Noah
noah katz is offline  
post #73 of 203 Old 10-01-2014, 02:16 PM
AVS Forum Special Member
 
V.X.Donique's Avatar
 
Join Date: Jan 2004
Location: Black Mesa Research Facilities
Posts: 1,139
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
Liked: 45
So what would be the best route to take for sealed, peq wise?

V.X.Donique
Introducing the Vier Systems Xero.1/Midbasiks Subwoofer builds....
Creator of the AVScience DIY Speakers and Subwoofers Forum
"Don't concentrate on the finger or you will miss all that heavenly glory." -Bruce Lee
V.X.Donique is offline  
post #74 of 203 Old 10-01-2014, 02:38 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
I have the I Nuke amp with DSP and on my two vented subs I don't use a HPF with them tune to around 16 Hz. I have used this for some time and have never had a driver bottom out at reference even using a slight bass boost. I am running to large boxes with the Dayton Ultimax 18 DVC drivers. I have part of the slot plugged.

I also use two dual large sealed boxes with the Ultimax. So, no HPF in the system using a boost at 20 and 30 Hz and no cuts for the house curve. I tried what LTD recommended but lost spl. My personal feeling are the less filters and shelf used with the I Nuke amps, the better. Maybe, I missed something.
derrickdj1 is offline  
post #75 of 203 Old 10-01-2014, 02:46 PM
AVS Forum Addicted Member
 
beastaudio's Avatar
 
Join Date: Dec 2010
Location: Western NC
Posts: 14,672
Mentioned: 402 Post(s)
Tagged: 1 Thread(s)
Quoted: 5708 Post(s)
Liked: 5552
Quote:
Originally Posted by V.X.Donique View Post
So what would be the best route to take for sealed, peq wise?
With the DCX, you would basically do opposite what john showed here to get an "LT" style low end boost. I did it with good success on my DCX
V.X.Donique likes this.

European Models do not accept banana plugs
Belly of the Beast: Bass Bunker Theater
beastaudio is offline  
post #76 of 203 Old 10-01-2014, 03:10 PM
AVS Forum Special Member
 
V.X.Donique's Avatar
 
Join Date: Jan 2004
Location: Black Mesa Research Facilities
Posts: 1,139
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
Liked: 45
Modding my new 6000dsp here, so I have some catching up and reading to do. I would assume tweaking the 6K no different then?

V.X.Donique
Introducing the Vier Systems Xero.1/Midbasiks Subwoofer builds....
Creator of the AVScience DIY Speakers and Subwoofers Forum
"Don't concentrate on the finger or you will miss all that heavenly glory." -Bruce Lee
V.X.Donique is offline  
post #77 of 203 Old 10-01-2014, 03:44 PM
AVS Forum Special Member
 
laugsbach's Avatar
 
Join Date: Jun 2007
Location: Cincinnati, Ohio
Posts: 2,852
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
Liked: 225
Quote:
Originally Posted by beastaudio View Post
I did it with good success on my DCX
Same here...

I love my 'old school' DCX...
laugsbach is offline  
post #78 of 203 Old 10-01-2014, 03:53 PM
AVS Forum Addicted Member
 
Archaea's Avatar
 
Join Date: Apr 2004
Location: Kansas City, MO
Posts: 11,416
Mentioned: 647 Post(s)
Tagged: 2 Thread(s)
Quoted: 4045 Post(s)
Liked: 3847
Quote:
Originally Posted by sslv2pwned View Post
Is there value in doing this with sealed subs?

Sent from my Nexus 7 using Tapatalk
I've found value because I'm running two ultimax 18's per channel of a pair of iNuke DSP6000s.

Without the HPF (currently set at about 11hz per LTD02's instructions) my amps both trip and reset in the blackhawk down scene. With the HPF, no problems at the same volume. There is still some pulsing in the room with the HPF, (which I still say is overrated) - but the amps don't shut down.

MOAR AMPS you say? maybe later not sure I really need it....each driver is getting about 1000 watts, since the iNuke has been measured to put out between 1800 - 2100 per channel. I pretty much think anything below about 15hz isn't worth chasing with avid enthusiasm.

outside of the exceptionally low stuff I don't have any problem with the two amps, driving the eight subs I have. This problem may have as much do do with the ultimax's impedance curve which is lowest resistance at 8hz and down --- meaning I'm then running the iNuke's at closer to 2ohm per channel when powering two 4ohm subs per channel and the iNuke 6000 amps aren't rated for two ohm stereo use.

But whatever --- in answer to your question I found the HPF valuable for my eight sealed. Being that I value not having my amps shutdown, and $800 extra dollars in my pocket (cost of buyign two more) to a greater degree than I value the lowest subsonic frequencies.


Now I'll admit I'm considering buying a minidsp at some point and one of those bossobass reworked clone amps that they are talking about on data-bass forurms.

Archaea's 9.12.4 Home Theater Room
(13) JBL CBT 70j-1 | (8) Ultimax UM18-22 sealed subwoofers | (4) MB Quart 12" subwoofers mounted directly to Berkline theater chairs BOSS style | Denon x7200wa AVR | Epson 5040UB Projector | Jamestown 144", 2.35:1 AT screen w/ Seymour XD fabric

Last edited by Archaea; 10-01-2014 at 05:03 PM.
Archaea is online now  
post #79 of 203 Old 10-01-2014, 04:40 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
For the Dayton Ultimax, I run one driver per channel. This keeps the amp from shutting down or the knobs from turning red representing impending shutting down. For me, the cleanest and most dynamic performance of the subs comes from using the least amount of filters and shelfs as possible.

Adjusting the Q to 0.63 will extend the bass below the 20 Hz mark in my system.

Last edited by derrickdj1; 10-01-2014 at 05:19 PM.
derrickdj1 is offline  
post #80 of 203 Old 10-01-2014, 05:20 PM
Advanced Member
 
mlah384's Avatar
 
Join Date: Jan 2010
Location: Mississippi
Posts: 909
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 509 Post(s)
Liked: 231
Quote:
Originally Posted by derrickdj1 View Post
For the Dayton Ultimax, I run one driver per channel. This keeps the amp from shutting down or the knobs from turning red representing impending shutting down. For me, the cleanest and most dynamic performance of the subs comes from using the least amount of filters and shelfs as possible
Are your Ultimax's 18"? And do you have them sealed or ported? I'm gonna be running two ultimax 18's in minimarty boxes on an iNuke 6000dsp and want to know the ideal settings for my particular setup...
mlah384 is offline  
post #81 of 203 Old 10-01-2014, 06:55 PM
AVS Forum Special Member
 
Samps's Avatar
 
Join Date: Feb 2014
Location: Pittsburgh, PA
Posts: 2,798
Mentioned: 52 Post(s)
Tagged: 0 Thread(s)
Quoted: 1250 Post(s)
Liked: 936
I took some measurements of my martycube with 3000dsp. these are with the sub in the middle of the room with a UMIK-1 placed about 6 inches from the cone and ports. First I left the dsp with just the regular 20hz HPF, next I did no HPF (with my fingers crossed), then i did a 20hz PEQ of +3db with a Q of 2. The PEQ came very close to the no HPF line but I'm not sure if it would still protect the driver. I only tested down to 15 hz just to be safe. i did not test this threads recommended method since i didn't see it until too late.

would there be a way to keep the graph more flat longer and then drop off fast? like using a 24db slope instead of the 12db slope. i'm thinking i would rather have good output down to 18hz and then nothing below instead of a little down low but giving up more of the 18-22hz.
Attached Thumbnails
Click image for larger version

Name:	SI18 NU3000DSP Mid Room REW.JPG
Views:	278
Size:	127.3 KB
ID:	290305   Click image for larger version

Name:	photo.jpg
Views:	200
Size:	135.0 KB
ID:	290321  
Samps is online now  
post #82 of 203 Old 10-01-2014, 08:08 PM
AVS Forum Special Member
 
derrickdj1's Avatar
 
Join Date: Sep 2011
Posts: 3,767
Mentioned: 102 Post(s)
Tagged: 0 Thread(s)
Quoted: 1005 Post(s)
Liked: 767
Quote:
Originally Posted by mlah384 View Post
Are your Ultimax's 18"? And do you have them sealed or ported? I'm gonna be running two ultimax 18's in minimarty boxes on an iNuke 6000dsp and want to know the ideal settings for my particular setup...
I have two Large vented subs with the Dayton 18 Ultimax. I also have two large dual Ultimax 18's in sealed boxes. The vented box has a slot that I stuffed with foam for 1/3 of the width. This lowered the tunning frequency from around 20 to 16 Hz. I was hesitant to run the subs without a HPF but, careful trials revealed that the driver in the large cabinet was safe to use in this fashion. I have tested the vented subs with the following movies at reference with no driver problems: OHF, WOTW, Oblivion, 9, Cloverfied, TIH and others. On most of the movies, I have bumped the trim to run hot at reference.

I would caution you that HPF are a good ideal and depending on your subs, this may be needed. I am sure others will comment on what you are considering. You will love the Ultimax in a vented box.
derrickdj1 is offline  
post #83 of 203 Old 10-02-2014, 07:30 AM
AVS Forum Addicted Member
 
beastaudio's Avatar
 
Join Date: Dec 2010
Location: Western NC
Posts: 14,672
Mentioned: 402 Post(s)
Tagged: 1 Thread(s)
Quoted: 5708 Post(s)
Liked: 5552
Quote:
Originally Posted by Samps View Post
I took some measurements of my martycube with 3000dsp. these are with the sub in the middle of the room with a UMIK-1 placed about 6 inches from the cone and ports. First I left the dsp with just the regular 20hz HPF, next I did no HPF (with my fingers crossed), then i did a 20hz PEQ of +3db with a Q of 2. The PEQ came very close to the no HPF line but I'm not sure if it would still protect the driver. I only tested down to 15 hz just to be safe. i did not test this threads recommended method since i didn't see it until too late.

would there be a way to keep the graph more flat longer and then drop off fast? like using a 24db slope instead of the 12db slope. i'm thinking i would rather have good output down to 18hz and then nothing below instead of a little down low but giving up more of the 18-22hz.
Take additional measurements out in the room or at your MLP and see what you come up with. For a ported sub, that doesn't quite look right however.

European Models do not accept banana plugs
Belly of the Beast: Bass Bunker Theater
beastaudio is offline  
post #84 of 203 Old 10-02-2014, 06:55 PM
Senior Member
 
sslv2pwned's Avatar
 
Join Date: Apr 2012
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 37
LTD02 - Is there a way to force the iNuke DSP to boost lower than 20hz?
sslv2pwned is offline  
post #85 of 203 Old 10-02-2014, 10:09 PM
AVS Forum Addicted Member
 
noah katz's Avatar
 
Join Date: Apr 1999
Location: Mountain View, CA USA
Posts: 23,270
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 2271 Post(s)
Liked: 833
do the opposite of the HPF

Noah
noah katz is offline  
post #86 of 203 Old 10-02-2014, 11:52 PM
Senior Member
 
sslv2pwned's Avatar
 
Join Date: Apr 2012
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 37
Quote:
Originally Posted by noah katz View Post
do the opposite of the HPF
I used the settings in the first post but added +3 gain. It pulled everything below 20hz way down.
sslv2pwned is offline  
post #87 of 203 Old 10-03-2014, 03:47 AM - Thread Starter
AVS Forum Addicted Member
 
LTD02's Avatar
 
Join Date: Oct 2003
Posts: 21,275
Mentioned: 888 Post(s)
Tagged: 1 Thread(s)
Quoted: 2998 Post(s)
Liked: 3745
"LTD02 - Is there a way to force the iNuke DSP to boost lower than 20hz?"


yes. just leave off the high pass filter portion.


the high shelf with negative gain at 20hz will create a shelf filter that will boost the response below 20hz by however much you dial in.


the yellow line in the o.p. shows the effect of 12db/oct high shelf with negative -12db gain. essentially it will be +3 at 20hz, and about +9db by 10hz, and about +12db total. each +3db requires two times the amp power and 1.414 times as much driver excursion. so be careful.


I'm not quite sure why one would want to do that as it will eat up a lot of amp and may damage the drivers, but since you asked. :-)~

Listen. It's All Good.

Last edited by LTD02; 10-03-2014 at 03:51 AM.
LTD02 is offline  
post #88 of 203 Old 10-03-2014, 05:01 AM
Senior Member
 
sslv2pwned's Avatar
 
Join Date: Apr 2012
Posts: 408
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 127 Post(s)
Liked: 37
Good to know. I guess I won't do it then.

Sent from my Nexus 7 using Tapatalk
sslv2pwned is offline  
post #89 of 203 Old 10-03-2014, 05:40 AM
AVS Forum Special Member
 
laugsbach's Avatar
 
Join Date: Jun 2007
Location: Cincinnati, Ohio
Posts: 2,852
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 170 Post(s)
Liked: 225
Quote:
Originally Posted by LTD02 View Post
...the high shelf with negative gain at 20hz will create a shelf filter that will boost the response below 20hz by however much you dial in.
What about using a Low Shelf filter (LS12) with positive gain?
laugsbach is offline  
post #90 of 203 Old 10-03-2014, 06:28 AM
AVS Forum Special Member
 
V.X.Donique's Avatar
 
Join Date: Jan 2004
Location: Black Mesa Research Facilities
Posts: 1,139
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 52 Post(s)
Liked: 45
Thumbs up

Quote:
Originally Posted by laugsbach View Post
What about using a Low Shelf filter (LS12) with positive gain?

That's what I was thinking for sealed

V.X.Donique
Introducing the Vier Systems Xero.1/Midbasiks Subwoofer builds....
Creator of the AVScience DIY Speakers and Subwoofers Forum
"Don't concentrate on the finger or you will miss all that heavenly glory." -Bruce Lee
V.X.Donique is offline  
Sponsored Links
Advertisement
 
Reply DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


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