I just got a new sub and was trying to hook it up tonite. The amp's been in my car along with the amp for my components and the gain has been turned down and speaker wires removed.
Now when I turn the car on the sub amp goes on protect mode, even w/o the sub hooked up. It's getting power and is grounded properly, my comp amp works fine and is grounded to the same point. Fuses are okay too.
What could it be?