The input transformer is likely to be the most expensive part of the entire project. As an alternative, a couple of 12 Volt car batteries could be used. The input voltage to the regulator must be at ...

I'm doing a home subwoofer dyi project on an extreme budget. I don't own a receiver, but I do have a car stereo amplifier that should do about 200 watts bridged into 4 ohms. I know of a used PC parts ...