Does anyone have tried these LM3886 based board ? - 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 28th August 2010, 02:01 AM   #1
domtw is offline domtw  France
diyAudio Member
 
domtw's Avatar
 
Join Date: Mar 2008
Location: Taiwan
Default Does anyone have tried these LM3886 based board ?

I want to make a 6 channel amplifier that should be relatively cheap (less than 40USD par channel) but of descent quality.
It will drive actively up to a pair of 3way speaker.
About 100W@4 Ohms should be sufficient.
I would be better if it is low output impedance stable (3 Ohms or less)
I am now hesitating on what board to choose.

I have seen those boards:
- a PA100 type with 2xLM3886
- a BTL200 with NE5532 type
- a PA150 type

Does anyone tried one of them ?
What's your opinion ?
Thanks
__________________
Finished speakers: ArkBlack - RedArk - SD-miniArk
  Reply With Quote
Old 28th August 2010, 11:35 AM   #2
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi,
if you really need 100W into 4r0 then go discrete.
If you feel you must go with a 3886 based chipamp then a parallel 50W into 8ohms design will meet your power specification.
Do all the drivers in your 3way need the same voltage and/or current drive?

I recommend a pair of 3channel amplifiers. That way you can place each amplifier right next to the 3way speaker terminals and gain the advantages that come from using very short speaker cables.
__________________
regards Andrew T.
  Reply With Quote
Old 28th August 2010, 12:16 PM   #3
diyAudio Member
 
Join Date: Jun 2004
Location: the Netherlands
You might also google on LM4702 based boards. The can sound really good and the LM4702 is a amazing VAS chip.

Also take a look on the site of Panson from this forum. He offers very good compact amplifier board solutions.

Those semi discrete designs, often offer better stability in lower impedances and better heat transfer then full chip amps.

With kind regards,
Bas
  Reply With Quote
Old 28th August 2010, 11:49 PM   #4
domtw is offline domtw  France
diyAudio Member
 
domtw's Avatar
 
Join Date: Mar 2008
Location: Taiwan
Quote:
Originally Posted by AndrewT View Post
Hi,
if you really need 100W into 4r0 then go discrete.
If you feel you must go with a 3886 based chipamp then a parallel 50W into 8ohms design will meet your power specification.
Do all the drivers in your 3way need the same voltage and/or current drive?

I recommend a pair of 3channel amplifiers. That way you can place each amplifier right next to the 3way speaker terminals and gain the advantages that come from using very short speaker cables.
Hi Andrew!
Actually, I'll probably seldom need 100W@4Ohm.
I want this amplifier/active crossover to be flexible and to be able to load various load to it...

For the discrete and/or 3channel amp, do you have a particular kit in mind?

Quote:
Originally Posted by Sebastiaan View Post
You might also google on LM4702 based boards. The can sound really good and the LM4702 is a amazing VAS chip.

Also take a look on the site of Panson from this forum. He offers very good compact amplifier board solutions.

Those semi discrete designs, often offer better stability in lower impedances and better heat transfer then full chip amps.

With kind regards,
Bas
I'll check that... Thanks Bas!
__________________
Finished speakers: ArkBlack - RedArk - SD-miniArk
  Reply With Quote
Old 29th August 2010, 08:40 AM   #5
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
60W into 8ohms is available from the 3886.
Three of these amps could be fitted into a single chassis on one big heatsink to power an 8ohm driver, 3way speaker.
For discrete @ ~60W into 8ohms, look at DX and ESP and AKSA and so many others.
The advantage with going discrete is that some can tolerate 4ohm driver load without the need for a redesign. Whereas using a 3886 on 40hm requires the different supply voltage and in effect a different design.
__________________
regards Andrew T.
  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
2 lm3886 based amplifiers with different sounds franksmith Chip Amps 37 3rd October 2009 07:12 AM
My LM3886 Board Based On BR100 Schematic gcds Chip Amps 3 8th January 2009 09:08 PM
My version of GC, a LM3886 based Dino-Indo Chip Amps 94 8th October 2008 01:46 PM
LM3886 based amplifier russo Chip Amps 18 4th February 2008 11:27 AM


New To Site? Need Help?

All times are GMT. The time now is 11:12 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