Hi! I want to use an arduino to control a subwoofer, but I'm not sure how to go about it. I need to make the subwoofer play a series of low-frequency tones, below the range of human hearing. The smallest subwoofer I could find is rated for 25 watts, so it seems I'll need to amplify the pwm output quite a lot. Anyone know what sort of amplifier I would need to use, or if there is a shield or something I could use? I looked at the wave shield, but since it only outputs 8 watts and I don't want to play .wav files, it doesn't seem particularly useful.
The catch is, this whole setup needs to battery-powered and small/light enough to wear on your back. I'm not sure that's possible with these sorts of components; if not, I'm going need a new idea.