Please review this mono-summing - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

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 11th August 2006, 11:47 PM   #1
regal is offline regal  United States
diyAudio Member
Join Date: Jan 2004
Location: MD
Default Please review this mono-summing

I can't believe there are no commercial RCA stereo to mono summing boxes.

Please look at this circuit. Do I need a DC blocking cap on the output?
Attached Images
File Type: gif monosumming10.gif (7.5 KB, 418 views)
  Reply With Quote
Old 11th August 2006, 11:58 PM   #2
poobah is offline poobah  United States
diyAudio Member
poobah's Avatar
Join Date: Nov 2005
Depends on what you are connecting to.
  Reply With Quote
Old 12th August 2006, 01:48 AM   #3
regal is offline regal  United States
diyAudio Member
Join Date: Jan 2004
Location: MD
I will be adding this to the output of my DIY tube preamp, going to a home theater reciever
  Reply With Quote
Old 12th August 2006, 04:20 AM   #4
diyAudio Member
edjosh23's Avatar
Join Date: Oct 2004
Location: Raleigh/Atlanta
I have 20 of those things... I've been wondering what I should do with them.

  Reply With Quote
Old 8th November 2006, 10:00 PM   #5
CarlosT is offline CarlosT  United States
diyAudio Member
Join Date: Oct 2006
Not to hijack this thread but I have a related issue. I'm trying to combine the outputs of an iPod/MP3 player into a single mono channel to feed a non-inverting LM3875 chipamp. Would a simple 10K ohm resistor in line with each + input work before summing the channels? I'm looking to do the simplest thing that'll keep me outta trouble.

Something like this...

Does the fact the the chipamp kit is non-inverting have anything to do with anything for summing channels?

  Reply With Quote
Old 18th November 2006, 02:34 AM   #6
diyAudio Member
Join Date: Jan 2006
Location: Fairmount, GA
Seems to me, you summed them at the 26k resistors. What purpose does the op amp serve? Gain? Impedance matching? Just curious.
Poor stereo mix? Switch to mono! Perfect.
  Reply With Quote


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
Summing Op-Amp circuit FastEddy Subwoofers 48 29th November 2015 04:50 PM
DIY summing ? jayjaybee Analogue Source 16 25th July 2010 08:27 AM
Summing a stereo signal to mono for bass... MikeHunt79 Subwoofers 1 16th January 2008 09:48 PM
Summing at the LTPI memphissound Tubes / Valves 2 11th January 2008 04:36 PM
Xtreme Noob - Summing Channels For Mono 3875 CarlosT Chip Amps 37 30th November 2006 12:36 AM

New To Site? Need Help?

All times are GMT. The time now is 02:03 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2