lm3886 for sub amp - Page 2 - 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 6th August 2008, 03:29 PM   #11
diyAudio Member
 
kuldeepsingh's Avatar
 
Join Date: Aug 2006
Location: Chennai, India
Send a message via MSN to kuldeepsingh
Better go for Solid state class AB amp if u r looking power in excess over 200W for a subwoofer. Why to spend 4-6 LM3886 for a subwoofer.
Solid state amp will keep cost down and is Ok for countineous high power use and keep exotic LM3886 ICs for Nornal bass or midrange driver.
__________________
. . .. ... ..... ........ ............. ..................... ..................................
My Blog
  Reply With Quote
Old 7th August 2008, 01:50 AM   #12
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
Im still learning, and if i screw something than better some cheap then something expensive...and overall i love lm3886
__________________
Dance4Life
Tiesto4Life
  Reply With Quote
Old 7th August 2008, 01:54 AM   #13
Leolabs is offline Leolabs  Malaysia
diyAudio Member
 
Leolabs's Avatar
 
Join Date: Dec 2004
Location: Bukit Mertajam
Send a message via MSN to Leolabs
Quote:
Originally posted by bego2
any link?

i need project with layout board!
Example:

http://www.shine7.com/audio/bpa300.htm
  Reply With Quote
Old 7th August 2008, 03:32 AM   #14
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
now for that...to expensive...need something around 100w rms on 4 ohms..2-3 chips, nothing more, some small shematic with layout.

many thanks.
__________________
Dance4Life
Tiesto4Life
  Reply With Quote
Old 7th August 2008, 08:14 AM   #15
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
have you looked at the National Application notes?
__________________
regards Andrew T.
  Reply With Quote
Old 9th August 2008, 08:30 PM   #16
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
no. now your question is why? i don`t understand a lot off things from data sheet. but i will look...
__________________
Dance4Life
Tiesto4Life
  Reply With Quote
Old 27th August 2008, 12:32 AM   #17
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
anybody else? my gainclone is almost finished...i need something to do
__________________
Dance4Life
Tiesto4Life
  Reply With Quote
Old 27th August 2008, 05:01 AM   #18
diyAudio Member
 
Join Date: May 2008
Have you seen this?

Probably the simplest way to build an amplifier, if your hands are not too shaky.

For parallel application you build that twice and connect the input in parallel to both ICs. Connect a resistor 0,1Ohm 3W or 0,22Ohm 5W to each output. Connect the open ends of the resistors together and connect the speaker there.

If you build a parallel application, you need to make sure that the three resistors Rb, Rf, Ri are matched to 0,1%. Rb is not in the schematic in the above link, but you should fit it in between Rg and the ICs non-inverting input. Use the same value as for Ri.

Add a snubber 2,7Ohm and 100nF to the output.

Add some bigger capacitors to your PSUs, because you want punch for a subwoofer.
  Reply With Quote
Old 27th August 2008, 03:30 PM   #19
bego2 is offline bego2  Croatia
diyAudio Member
 
Join Date: Aug 2007
yes, seen that before, but i want shematic with board (layout). p2p is ugly.

btw - my friend made gc by that guide.
__________________
Dance4Life
Tiesto4Life
  Reply With Quote
Old 27th August 2008, 03:38 PM   #20
Nordic is offline Nordic  South Africa
diyAudio Member
 
Nordic's Avatar
 
Join Date: Sep 2005
http://users.tpg.com.au/users/gerskine/dxamp/

You can manage a chipamp, so you are ready for the next step... assembling this real 100W into 4R amp should be within your reach now... It will cost about the same as a chipamp, but will eat it for breakfast in a sub. Look up the original DX.
  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
My First LM3886 GC samsagaz Chip Amps 49 29th June 2008 07:55 PM
Psu Lm3886 Mayday Chip Amps 29 29th April 2007 06:10 PM
Lm3886 Bpa Tombson Chip Amps 99 21st August 2006 12:04 PM
Are two separate lm3886 = 2*lm3886 in parallel or bridge mode rs1026 Chip Amps 11 21st October 2004 10:24 AM


New To Site? Need Help?

All times are GMT. The time now is 03:36 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