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

Chip Amps Amplifiers based on integrated circuits

Multi-Channel Volume Balancing
Multi-Channel Volume Balancing
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 21st February 2005, 04:35 PM   #1
Firebug24k is offline Firebug24k  United States
diyAudio Member
 
Join Date: Mar 2004
Location: Illinois
Default Multi-Channel Volume Balancing

Hello,

I'm currently working on a 4 channel amp based off of two LM4780s, and I'm not really sure how to go about keeping the audio levels balanced between the four speakers. I've made a nice stepped attenuator wired up with 1% tol resistors to make a volume control, but how do I go about using it for all four channels? Is it possible?

Thanks!
Jay
  Reply With Quote
Old 21st February 2005, 05:53 PM   #2
homer09 is offline homer09  Canada
diyAudio Member
 
homer09's Avatar
 
Join Date: Jan 2004
Location: Montreal
Default Re: Multi-Channel Volume Balancing

Quote:
Originally posted by Firebug24k
Hello,
I've made a nice stepped attenuator wired up with 1% tol resistors to make a volume control, but how do I go about using it for all four channels? Is it possible?
Depends how many gangs yer stepped attenuator has, if you followed a standard recipe for making a volume control, it probably can only handle two channels and there is no way to make it control 4 separate channels.

I think your options for balance now are building another attenuator and you should have left-right balance. if you also want back-front, you will need another 2 attenuators (4 mono ones)
  Reply With Quote
Old 21st February 2005, 07:06 PM   #3
wooferhound is offline wooferhound  United States
diyAudio Member
 
wooferhound's Avatar
 
Join Date: Feb 2004
Location: Huntsville Alabama USA
You need a Variable Resister that is ganged. specifically 4 identical variable resistors on the same rod that rotate as one. then you will be adjusting them all at once.

You can find these in old quadrphonic amplifiers as the main volume control
__________________
}=- W o o f -={
  Reply With Quote
Old 22nd February 2005, 06:13 AM   #4
Firebug24k is offline Firebug24k  United States
diyAudio Member
 
Join Date: Mar 2004
Location: Illinois
Yeah, mine only can do two channels at once. I'll look into grabbing one that can do four - thanks.
  Reply With Quote

Reply


Multi-Channel Volume BalancingHide 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
Creating 5.1 Multi Channel sound from 2 channel jenkrich Everything Else 5 1st September 2009 07:29 AM
Eye tube for balancing multi amp system mashaffer Tubes / Valves 0 10th September 2008 06:04 PM
multi-channel volume control Chispa Solid State 13 17th April 2007 07:34 PM
Multi purpose multi channel gainclone PCB: Team project - group buy rick57 Chip Amps 14 29th March 2003 05:54 PM


New To Site? Need Help?

All times are GMT. The time now is 11:56 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
Wiki