Good but simple subwoofer chip amp. circuit suggestion

[Alvin]

Hello,

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!

Alvin.

[deandob]

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.

Regards,

Dean

[soundNERD]

I use a 3886 built with the circuit on the 1st page of the datasheet.

Not too powerrful, but simple and does the job.


-mike