}I have a 15 inch Eclipse sub and a 500/1 JL amp. It's pounds as is but does anyone know what settings I should have the amp on? I think it has more POTENTIAL... I don't know if the settings are set right... or if I get another amp, will it hit harder? Does the cd player make a difference in the sound? As you can tell, I don't know about car systems so can anyone can help me... please!