running two amps off the same power line? Depends on the wattage of your amps, you could be getting very little power to your amps... you could have too small of a inline power fuse, thus, not allowing enough power to your amps. as far as the gound... are you running the same guage wire for ground as you are the power wire? and you don't want the ground wire any longer than 2 feet really.... and is the ground bolted to a painted surface?