Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

Parallel 3875 or single 3886 for low impedance speakers?
Parallel 3875 or single 3886 for low impedance speakers?
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 16th July 2004, 09:59 PM   #1
Groucho2004 is offline Groucho2004  Spain
diyAudio Member
 
Join Date: Jul 2004
Location: Barcelona
Default Parallel 3875 or single 3886 for low impedance speakers?

Hi,

I am planning to build a gainclone which should be able to drive my KEF Reference 2 speakers. These have a nominal impedance of 4 Ohms with a minimum of ~3 Ohms. So, would it be better to use 2 LM3875 in parallel or just 1 LM3886 chip? I read somewhere that the 3875 sounds better so maybe 2 of those are preferrable?

Thanks in advance for any advice.
  Reply With Quote
Old 16th July 2004, 10:49 PM   #2
Morbid is offline Morbid  Israel
diyAudio Member
 
Morbid's Avatar
 
Join Date: Jun 2004
Location: israel
Send a message via ICQ to Morbid
LM3886 and 3875 are almost the same.
you wont notice the sound between them...
the difference is that you have more parameters are connected legs in the 3886, the 3875 has only 6 (?) legs to operate... +/-/Gnd/Out/In+/In-

and the 3886 have also 2 Vcc and Mute feature....

its ok to use this chip for 4 ohm but you need to know the output u need and the voltage to use...
if u need 0-50Watts , one chip with good cooling will do.
if u need more than that you will start bridging amps or try to find bigger chips (STK!!!)

hope I helped
  Reply With Quote
Old 17th July 2004, 08:31 PM   #3
tlmadsen is offline tlmadsen  Denmark
diyAudio Member
 
tlmadsen's Avatar
 
Join Date: Aug 2003
Location: Roskilde - The vikingships
Go for two or more LM3886 in parallel. With your low impedance speaker, you need current, not voltage.

See my replay at:

http://www.diyaudio.com/forums/showt...threadid=30570

Have fun

Thomas
  Reply With Quote

Reply


Parallel 3875 or single 3886 for low impedance speakers?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
3875 sounds better, 3886 measures better? sendler Chip Amps 9 24th February 2009 06:30 AM
3886 3875 4780 for sale elementx Swap Meet 3 13th October 2007 04:35 AM
Resistor value in 3875 and 3886 haziz Chip Amps 3 29th April 2007 11:40 PM
What are the differences between the 3875, 3886, and 4780? AJ Bertelson Chip Amps 5 24th January 2006 07:47 PM
Is there consensus on 3875 vs 3886 ?? Rick NL Chip Amps 4 5th September 2003 08:18 AM


New To Site? Need Help?

All times are GMT. The time now is 01:18 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki