Good but simple subwoofer chip amp. circuit suggestion - diyAudio
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Old 29th December 2003, 04:04 AM   #1
Alvin is offline Alvin  Hong Kong
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Join Date: Oct 2003
Location: Hong Kong
Default Good but simple subwoofer chip amp. circuit suggestion


I am planning to DIY a pair of active subwoofer using SS 25W/8565-01 as drivers.
The cabinet should be 50~60L vented.
Now, I am looking for the circuit that need to include:

1) the amplication, preferably using chip amp. (e.g. LM3875 or OPA549)
2) the equalization to equalize the not so smooth SPL
3) the active XO, better selectable.

Thanks very much!

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Old 17th January 2004, 09:37 AM   #2
deandob is offline deandob  Australia
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Join Date: Oct 2002
Location: Brisbane, Australia
Default No interest?

I would have thought a DIY subwoofer amp would be a popular topic.

I have attached a 240w class-D schematic from a new philips chip TDS8924. This is attractive for a DIY subwoofer as it has a very low parts count (simple design), high power, acceptable performance, needs a small heatsink & small power supply. Only trouble is it is not available to purchase yet as the chip is new.


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Old 17th January 2004, 01:04 PM   #3
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Join Date: Sep 2003
Location: Illinois
I use a 3886 built with the circuit on the 1st page of the datasheet.

Not too powerrful, but simple and does the job.

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