Does bridge of two LM3886 sound better? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

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
Reply
 
Thread Tools Search this Thread
Old 13th March 2012, 12:38 PM   #1
Roushon is offline Roushon  India
diyAudio Member
 
Join Date: Sep 2004
Location: Mumbai (Bombay)
Default Does bridge of two LM3886 sound better?

I requested for a suggestion in my old following thread. But it got the
wrong thread name. That is why started this new thread. The request is
here:

PCB design of parallel of two inverted LM3886 with buffer and dc-servo.

For a 8Ohm speaker which sounds better: parallel or bridge of two LM3886.

Thanks
Roushon
__________________
S. Roushon
  Reply With Quote
Old 13th March 2012, 12:48 PM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Compare each to a single chipamp implementation.
__________________
regards Andrew T.
  Reply With Quote
Old 13th March 2012, 12:56 PM   #3
diyAudio Member
 
Osvaldo de Banfield's Avatar
 
Join Date: Dec 2011
Location: Barrio Garay,Almirante Brown, Buenos Aires, Argentina
In any case the distortion will be multiplied: you have 2 amps generating noise and distortion compared to only one.
__________________
LW1DSE
  Reply With Quote
Old 13th March 2012, 02:35 PM   #4
Puffin is offline Puffin  United Kingdom
diyAudio Member
 
Join Date: Feb 2006
Location: U.K
I have single 3886 mono blocks and bridged monoblocks. IMO the bridged amps are smoother for some reason.
  Reply With Quote
Old 13th March 2012, 02:39 PM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Default ?

Better preparation prior to the last few coats of paint?
__________________
regards Andrew T.
  Reply With Quote
Old 13th March 2012, 02:46 PM   #6
Puffin is offline Puffin  United Kingdom
diyAudio Member
 
Join Date: Feb 2006
Location: U.K
I threw a kitchen sink full of good quality and overspecced caps in the bridged amps as I had them and I could. Maybe that is it. I don't normally hold with that thinking?
  Reply With Quote
Old 13th March 2012, 02:53 PM   #7
diyAudio Member
 
abraxalito's Avatar
 
Join Date: Sep 2007
Location: Hangzhou - Marco Polo's 'most beautiful city'. 700yrs is a long time though...
Blog Entries: 98
Send a message via MSN to abraxalito Send a message via Yahoo to abraxalito Send a message via Skype™ to abraxalito
I'd go for bridged sounding better - its a bit harder to mess up the grounding when there are no high ground return currents. Layout is much easier. Of course distortion is going to be higher into 4R than 8R but its probably not going to be high enough to be audible whereas poor grounding is very likely to be.
__________________
It doesn't have to take the form of a conspiracy, rather a consensus... James H Kunstler
  Reply With Quote
Old 14th March 2012, 03:27 AM   #8
Roushon is offline Roushon  India
diyAudio Member
 
Join Date: Sep 2004
Location: Mumbai (Bombay)
Default Thanks!

Thanks to all for your comments and suggestions. In the present form the
amp (parallel) has little noise. Hoping I will be able to solve the
RF problem as well. My only concern was at the same volume level whether
the bridge will sound better than the parallel which will justify the hard
work. Will have to cut two tracks and flip the connection to convert one
of the inverted to non-inverted. I think there is another solution without
making this change, that is using DRV134, but do not know if attaching
another IC on the signal path is OK.

Regards
Roushon.
__________________
S. Roushon
  Reply With Quote
Old 14th March 2012, 12:06 PM   #9
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Before you alter it, compare it to a single.

Then repeat the single to the modified comparison.

But do ensure that the load for all three versions is within the capability of the amplifiers' drive.
__________________
regards Andrew T.
  Reply With Quote
Old 15th March 2012, 05:38 PM   #10
diyAudio Member
 
kuldeepsingh's Avatar
 
Join Date: Aug 2006
Location: Chennai, India
Send a message via MSN to kuldeepsingh
read this article - Lenard Audio - Education - Amplifiers.

esp the "Bridge amp advantage"
__________________
. . .. ... ..... ........ ............. ..................... ..................................
My Blog
  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
Simplified LM3886 Bridge Amp Michael Bean Chip Amps 11 29th August 2011 03:06 PM
How to bridge an LM3886 with an input transformer MtBiker Chip Amps 6 15th April 2011 12:16 AM
Are two separate lm3886 = 2*lm3886 in parallel or bridge mode rs1026 Chip Amps 11 21st October 2004 10:24 AM
Bridge+Parallel LM3886, Doable? Tim__x Chip Amps 6 23rd June 2004 05:32 PM
Bridge/Parallel LM3886 Amp Toucan Solid State 2 15th March 2003 11:46 AM


New To Site? Need Help?

All times are GMT. The time now is 08:18 AM.


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