Go Back   Home > Forums > >

Chip Amps Amplifiers based on integrated circuits

How to parallel multiple power amps?
How to parallel multiple power amps?
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
Old 25th November 2020, 12:04 PM   #11
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
How to parallel multiple power amps?-tow-lm-jpg
This is the transient response of the multiplier driven by main LM1875. It is not perfection but very stable.
Attached Images
File Type: jpg tow lm.JPG (42.0 KB, 225 views)
File Type: jpg CURRENT MULTIPLIER4b.JPG (22.5 KB, 93 views)
  Reply With Quote
Old 25th November 2020, 01:19 PM   #12
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
Discard the precedant post, wrong circuit.


How to parallel multiple power amps?-2lm-jpg
Attached Images
File Type: jpg CURRENT MULTIPLIER4b.JPG (62.9 KB, 93 views)
File Type: jpg 2lm.JPG (43.9 KB, 136 views)
File Type: jpg CURRENT MULTIPLIER4.JPG (62.9 KB, 9 views)

Last edited by kokoriantz; 25th November 2020 at 01:23 PM.
  Reply With Quote
Old 25th November 2020, 02:00 PM   #13
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
Quote:
Originally Posted by AKSA View Post
Hayk,

Is this needed? Rowlands has marketed amps with multiple chips, at high cost, and others had done this with HP amps too.

HD
FauxFrench tried to parallel bridge triple pair, it is so difficult to adjust the offset and the gain precisely on each six amplifiers. So I decided to take over his project but in my way. Frankly, I am very glade, as I created two new circuits.
  Reply With Quote
Old 25th November 2020, 02:18 PM   #14
anchorman is offline anchorman
diyAudio Member
 
Join Date: Sep 2009
Pluto electronics

Linkwitz paralleled two IC power amps for the woofer amp on his Pluto speakers. Schematic is in the post I linked if you scroll down. Look at the literature for the chip he was using, and maybe there is some more helpful information?
  Reply With Quote
Old 25th November 2020, 03:15 PM   #15
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
It is also possible to adjust the stability to perfection by adding an inductance to the main's resistance L2 of 100nH. This inductance can be realized by not using non inductive resistor and/or looping the leads single turn. Bellow is without and with. The scale is 50ns.

no inductor.JPG with 100nH.JPG

Last edited by kokoriantz; 25th November 2020 at 03:18 PM.
  Reply With Quote
Old 25th November 2020, 03:22 PM   #16
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
Quote:
Originally Posted by anchorman View Post
Pluto electronics

Linkwitz paralleled two IC power amps for the woofer amp on his Pluto speakers. Schematic is in the post I linked if you scroll down. Look at the literature for the chip he was using, and maybe there is some more helpful information?
It looks to be bridged, not paralleled. Thanks for showing there are interesting things.
Attached Images
File Type: jpg pluto.JPG (49.6 KB, 51 views)
  Reply With Quote
Old 25th November 2020, 04:00 PM   #17
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
square.jpg
This is 10khz square wave, What the people want better?
Why I have bad face on the thread? Should I stop here?
  Reply With Quote
Old 25th November 2020, 05:28 PM   #18
geraldfryjr is offline geraldfryjr  United States
diyAudio Member
 
Join Date: Feb 2008
Location: Jackson,michigan
Every one of those output gain stages should each have their own DCservo amp on them.

See this thread .....

BPA-200 servo problem

jer

Last edited by geraldfryjr; 25th November 2020 at 05:30 PM.
  Reply With Quote
Old 25th November 2020, 07:55 PM   #19
kokoriantz is offline kokoriantz  Lebanon
diyAudio Member
 
Join Date: Dec 2015
Location: south east asia
How to parallel multiple power amps?-bad-jpg




Why?
Why?
Why?
Why?
Attached Images
File Type: jpg bad face.JPG (20.9 KB, 109 views)
  Reply With Quote
Old 25th November 2020, 08:54 PM   #20
chermann is offline chermann  Austria
diyAudio Member
 
Join Date: Jan 2017
Location: Vienna
the first post i done by you and you can change the first post.
in advanced mode you can put away the sad smile
  Reply With Quote

Reply


How to parallel multiple power amps?Hide this!Advertise here!
Thread Tools

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
Multiple PAM8403 in parallel (same power supply) demiansmith Chip Amps 8 1st September 2020 11:36 AM
Whats the Main Purpose of Using Multiple Low Power Transistors in Parallel? escksu Power Supplies 11 18th July 2020 05:15 PM
Parallel opamp: an extreme audiophile amplifier made of parallel multibrand op-amps GianlucaG Chip Amps 24 30th November 2018 11:21 AM
5.1 with multiple T-amps + pre amps??? adamzx3 Everything Else 15 5th December 2008 06:28 AM
Parallel amps & Parallel Voice coils? officeboy Multi-Way 7 26th May 2004 08:12 PM


New To Site? Need Help?

All times are GMT. The time now is 03:13 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki