After disconnecting my box to fit a bike in my trunk and hooking everything back together, my subs only put out the same amount of power as my regular speakers. The bass goes up a bit if I turn the gain up. My ground cable came off the amp and I reconnected it with just the wire, not a ring terminal. The amp light is on the whole time. I believe I put tape over one of the speaker wires to the sub so they would not short but I am not certain. Does this sound like blown outputs or a bad ground? If you think the output may be bad, how would you go about testing them for strength? Just take a voltage and amperage reading to get the watts? Thanks in advance.