Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th July 2012, 10:31 AM   #1
ataul is offline ataul  Bangladesh
diyAudio Member
 
Join Date: Mar 2008
Default Need sub woofer controller

Have any body Sub woofer controller circuit diagram ? please send me. I have already visit ESP project.
  Reply With Quote
Old 15th July 2012, 11:16 AM   #2
diyAudio Member
 
Join Date: Feb 2009
i guess you meen active sub filter. here is a finiched board.
Sub Active Filter Board, SubWoofer PCB, Auto Power ON | eBay
  Reply With Quote
Old 22nd July 2012, 03:09 PM   #3
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
Cute little board on e-bay. But,
You want a sub controller, so you know you are looking for more than just a crossover. There are several approaches. One is the LT kind of circuit if you are doing a sealed sub. (On ESP) Another is more of a parametric filter. (also on ESP) Years ago there was one product that was a 5 band eq for 250 Hz and below with a crossover. Nifty. You could adjust the frequencies and Q of any equalizer circuit to do this. Again, I think ESP has a project like that. Another approach is to use a DXC or MiniDSP. Far more flexible. I recommend you visit the Linkwitz site and read what he has to say about sub controllers. My experience, the variable phase is useless. I move my subs around and do better by making use of the room.

Evaluate your needs carefully. Right now, none of my three systems with subs use any eq. The rooms combine with my speaker designs to be just about right. Only one of the systems has an external crossover. Again, by designing as a system, the two smaller systems with plate amps use the internal crossover. Only my main system where I run two subs off a Parasound amp has a complete 4th order two way LR crossover. A modified Behringer actually. One of these days I should build a nice FET high pass instead. Anyone got a good handy design?
  Reply With Quote
Old 22nd July 2012, 10:34 PM   #4
diyAudio Member
 
Join Date: Nov 2005
Location: Gävle
Send a message via MSN to siouxiebuff
http://lcaudio.dk/pdfs/subfilter.pdf
  Reply With Quote
Old 22nd July 2012, 11:07 PM   #5
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
Nice. Combination of a parametric filter and a crossover. I very much like the 4th order on the woofer so you don't localize it. Second at 80 Hz ( THX) I can. The two systems where I use a plate, the subs are very close to the mains, so 60 Hz second works OK. The above mentioned design would still need an additional crossover for the mains.

I did run across a FET crossover design on Enjoy the Music.
  Reply With Quote
Old 23rd July 2012, 01:16 AM   #6
tvrgeek is offline tvrgeek  United States
diyAudio Member
 
Join Date: Dec 2009
Location: Md
Reckhorn is another option.
  Reply With Quote
Old 23rd July 2012, 02:02 AM   #7
diyAudio Member
 
Join Date: Nov 2005
Location: Gävle
Send a message via MSN to siouxiebuff
I would seal the mains and use a LT-cirquit creating an acoustical HP function = 12 dB/oct @ 80 Hz Q=0,707 in series with a conventional 12 dB/oct @ 80 Hz Q=0,707 HP-filter to create a perfect 4:th order LR HP-function.
You could also use just a plain 12 dB/oct HP-filter leg like in most surround receivers, but then I would use a 30 dB/oct LP-filter with adjustable Q to make provisions for optimal integration.
I also like steep LP-filters. They really make a difference.
  Reply With Quote
Old 24th July 2012, 04:33 PM   #8
diyAudio Member
 
Join Date: Feb 2009
the subfilter i linked to has the same adjustments as the LCaudio circut.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB: 6.5" woofer to replace broken woofer in cheap band pass subwoofer Jimmy154 Swap Meet 2 5th October 2010 02:00 PM
Woofer replacement for Infinity Reference 2000.5 Woofer kchilaka Multi-Way 0 28th September 2010 05:11 AM
Samsung 1602VFD For CDROM Controller & Remote Volume Controller slowgay Swap Meet 2 22nd November 2008 02:44 PM
Active Sub-Woofer and Controller frequency adjustment PetarLD Solid State 3 19th June 2005 04:50 PM
Qts of Push-pull woofer and Compound Woofer System... haggy Multi-Way 1 13th December 2001 01:30 AM


New To Site? Need Help?

All times are GMT. The time now is 03:23 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2