My Active 4th Order Bandpass Subwoofer Project

A subwoofer suitable for audio and home theater applications, complete with a continuously adjustable center frequency, phase switch, and gain control. Also included are line level inputs as well as speaker level inputs for a high level of adaptability to any system without a sub. The box was laminated for a more elegant look since painting needs time to cure and time I don't have. :)

Some of the pcbs... (Chipamp and Adjustable Low Pass Filter)

The picture below shows the back plate at the right...

The box construction pics...

My nephew, happily working on the box... :)

Overall performance of the sub is excellent considering I am only using an old 12" subwoofer I have for so many years now. Plans are on going for another version that I will use for my home theater since the one shown is for my hi-fi :).

For inquiries, comments, violent reactions :), etc. Email: [email protected]

Cheers!