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Old 3rd August 2008, 02:53 PM   #1
bego2 is offline bego2  Croatia
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Default 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.
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Old 4th August 2008, 11:11 AM   #2
Dxvideo is offline Dxvideo  Turkey
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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..
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Old 4th August 2008, 03:03 PM   #3
bego2 is offline bego2  Croatia
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niceee.what do you mean by fitting a subwoofer filter? im planing to make some aktive filter for sub.

shematic?
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Old 4th August 2008, 04:40 PM   #4
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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
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Old 5th August 2008, 12:50 AM   #5
bego2 is offline bego2  Croatia
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hehe I mean shematic for amplifier but this is ok too.

are this parts for filter available in farnell?

thanks.
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Old 5th August 2008, 03:16 AM   #6
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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
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Old 5th August 2008, 11:55 PM   #7
Apex Jr is offline Apex Jr  United States
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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.
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Old 6th August 2008, 01:04 AM   #8
bego2 is offline bego2  Croatia
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other suggestion?

thx.
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Old 6th August 2008, 04:47 AM   #9
Leolabs is offline Leolabs  Malaysia
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If require more output power,then go for BPA configuration which is using 4 or more LM3886s and bigger size transformer.
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Old 6th August 2008, 02:35 PM   #10
bego2 is offline bego2  Croatia
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any link?

i need project with layout board!
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