what would cause this?
I had used it on and off for about 3 days and it worked fine. But now, anytime I turn on the amp, the sub starts going, even with the headunit off. The sub moves rapidly and creates a sound, as if its getting an audio signal, even with the headunit turned off. I've checked all wiring, everything is fine. I've played around with the amp settings (frequency, gain, EQ), and I just can't figure it out.
Any thoughts?

