s/500 dual to mono - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 April 2009, 01:59 PM   #1
joegio is offline joegio  United States
diyAudio Member
 
Join Date: Oct 2008
Question s/500 dual to mono

Hi All

I am new to DIY and this is my first post.
I recently built a set of ALPHA-LS speakers (last set available from CSS).
Now I'm off to amplifer selection.
I was woundering if and how a Threshold s/500 could be converted to a mono or bridged configuration.

Thanks
Joe
  Reply With Quote
Old 23rd April 2009, 06:00 PM   #2
The one and only
 
Nelson Pass's Avatar
 
Join Date: Mar 2001
Default Re: s/500 dual to mono

Quote:
Originally posted by joegio
I was wondering if and how a Threshold s/500 could be converted to a mono or bridged configuration.
If your load is very low impedance, you would consider simply
paralleling the inputs and outputs of the two channels after checking
for similar gain and offset between them.

If you want to bridge, you can either generate balanced signals (the
same signal but with + and - polarity) and feed them into the Left
and Right inputs, placing the speaker across the two (+) outputs
of the amplifier.

If you want to bridge internally, you can do so by feeding the output
of one channel back to the (-) input of the other channel through a
resistor equal in value to the high value feedback resistors used in
the loops of those two channels.

Which of those approaches is attractive to you?

  Reply With Quote
Old 24th April 2009, 04:29 AM   #3
joegio is offline joegio  United States
diyAudio Member
 
Join Date: Oct 2008
Thank for the detailed options.

I believe the second approach looks to be the simplest and can be accomplished using a preamp with balanced outputs.
  Reply With Quote
Old 27th April 2009, 12:12 AM   #4
joegio is offline joegio  United States
diyAudio Member
 
Join Date: Oct 2008
It took only a few hours to build an XRL to dual RCA splitter box and I am absolutely stunned by loud a clear my speakers could play.

  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
p3a dual mono? Big gain Solid State 19 15th November 2006 10:14 AM
making dual mono jack from single mono jack dubmunkey Analog Line Level 2 12th October 2006 02:16 PM
My Zen V4 Dual Mono wchick Pass Labs 37 11th November 2002 09:54 PM
Single Mono's or Dual Mono? Tazzy Pass Labs 8 3rd October 2002 02:03 PM
Dual Mono - Anti Mono Power Supplies pmkap Everything Else 3 16th February 2002 05:10 AM


New To Site? Need Help?

All times are GMT. The time now is 09:02 PM.


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