Today i finished up the sub install in my 98 civic. I turned on the car and the radio, and the sub started to work BUT i hadn't hooked up the power cable for the amp. Which i found super odd, so i hooked it up and went to test things out. I found that the sub is very "weak" sounding, and doesnt have much power at all. The amp is a legacy 1020 powering 1 JL 10" sub. It's bridged and the amp is set to mono. I tried playing around with settings to no avail. Switched amps with my cousins and it started to work. So could somebody please give me some suggestions before i go and buy a new amp