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-   -   lm3886 for sub amp (http://www.diyaudio.com/forums/chip-amps/127489-lm3886-sub-amp.html)

bego2 3rd August 2008 03:53 PM

lm3886 for sub amp
 
serched forum and fined that lm3886 is good for sub amplifier.

i need some amp, about 100w rms to run 4ohm drive (focal 30a1 sub), can two lm3886 in parallel aplication run focal 30a1 ?

would 225VA transformer run that amp?

need some shematic, i found something but i wont aou guys to tell me, whats the best... many thanks.

Dxvideo 4th August 2008 12:11 PM

To drive a 4 ohm sub, you will need two LM3886s or one LM4780 work in parallel.
Before it, you should fit a subwoofer filter of course.
Just one 160VA toroid will be enough to feed these amps..
That will give you more than 100W into 4R..

bego2 4th August 2008 04:03 PM

niceee.what do you mean by fitting a subwoofer filter? im planing to make some aktive filter for sub.

shematic?

kuldeepsingh 4th August 2008 05:40 PM

Quote:

Originally posted by bego2
niceee.what do you mean by fitting a subwoofer filter? im planing to make some aktive filter for sub.

shematic?

Have a visit to my Blog - http://diygainclone.blogspot.com/200...ilter-pcb.html

bego2 5th August 2008 01:50 AM

hehe I mean shematic for amplifier but this is ok too.

are this parts for filter available in farnell?

thanks.

kuldeepsingh 5th August 2008 04:16 AM

Quote:

Originally posted by bego2
hehe I mean shematic for amplifier but this is ok too.



Schematic link was also there - anyways this is the link
http://sound.westhost.com/project48.htm

Apex Jr 6th August 2008 12:55 AM

I use to sell a ParaPix Sub amp and there were 2000
of them, they are all gone and there is some information
and schematic on this page, near the bottom.
HTH's
They used 2 LM 3886T's

http://www.apexjr.com/parapixinfo.html

Steve @ Apex Jr.

bego2 6th August 2008 02:04 AM

other suggestion?:)

thx.

Leolabs 6th August 2008 05:47 AM

If require more output power,then go for BPA configuration which is using 4 or more LM3886s and bigger size transformer.

bego2 6th August 2008 03:35 PM

any link?

i need project with layout board!;)


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