Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Multi-Way Conventional loudspeakers with crossovers

Active crossover conversion
Active crossover conversion
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
Thread Tools Search this Thread
Old 29th January 2008, 04:08 PM   #1
Bonce is offline Bonce  United Kingdom
diyAudio Member
Join Date: Dec 2005
Location: Newbury/York, England
Default Active crossover conversion

I currently have a setup consiting on an amp driving a stereo subwoofer (it has 8 small drivers in total). In that sub there is a 2nd order high/lowpass pair with cutoff frequencies of 100Hz. The high pass of this then feeds into a pair of stereo bookshelf speakers, which are 2 way and have a crossover of some description inside.

Now to me this sounds fine but Imagine with the string of crossovers it could be greatly improved. My plan was to start by building an active 2nd order low/high to replace the passive in the sub, and then if I can find another stereo amp (I only have 2 at the moment) I would go 3 way active later on.

My question is, if I build a 100Hz low/high pass filter, can I use the high pass output later on to drive another ~3khz high/low pair? Or would it be better to take all of the inputs from the same source and then make seperate low/high/mid pass filters?
  Reply With Quote
Old 29th January 2008, 04:43 PM   #2
sdclc126 is offline sdclc126  United States
diyAudio Member
sdclc126's Avatar
Join Date: Jan 2005
Location: San Diego, CA
Active filters usually use the pre-amp output stage from your source, then pass the filtered signals to the separate power amps to drive the speakers.

It sounds like you're planning to run the speaker wires from your sub to the second active filter when you're ready to add that to your system. I suppose it could work if you can rig your second filter to accept speaker level inputs, but I just don't see a good reason to do this. What seems more practical is to add your second filter to the first, so it becomes an integrated 3-way, rather than a 2-way going to another 2-way at speaker level, which is essentially what you'd be doing.
Soft Dome
  Reply With Quote
Old 30th January 2008, 09:28 AM   #3
Bonce is offline Bonce  United Kingdom
diyAudio Member
Join Date: Dec 2005
Location: Newbury/York, England
I think i may have explained it badly, I've attatched a picture of my idea. Its either do this or do 3 seperate filters being driven from the preamp, a lowpass/bandpass/highpass to drive the seperate speakers. The configuration in the picture is my preference as it will allow me to make just the 100Khz high and lowpass filters first.

Just to point out all of the filters will be located in one box and then rigged to 3 stereo amps by phono leads, and then these amps will be connected to the speakers with short cable.
Attached Images
File Type: jpg crossover.jpg (15.0 KB, 157 views)
  Reply With Quote
Old 30th January 2008, 01:43 PM   #4
Bonce is offline Bonce  United Kingdom
diyAudio Member
Join Date: Dec 2005
Location: Newbury/York, England

Thats just answered my question
  Reply With Quote


Active crossover conversionHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB active 2-way crossover sanjeev Swap Meet 0 2nd December 2008 04:37 AM
DIY Active crossover !!!! zztop Solid State 19 27th February 2008 06:48 AM
Passive crossover into active crossover hahfran Multi-Way 16 10th February 2008 06:16 PM
PA vs DIY active crossover paulspencer Multi-Way 46 27th November 2004 01:25 AM
XVR1 active crossover, discrete active stage promitheus Pass Labs 18 22nd July 2002 01:29 AM

New To Site? Need Help?

All times are GMT. The time now is 04:05 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio