I have a kx500.2 kicker amp, and I have 2 12" L5's solobaric subs in a vented box, and I don't think it's got the power, as I have the gain on max, and it doesn't do it for me!!! It's in a trunk, but even when I open it it's not what I expected, I have heard better pyramid subs!! They are 4ohm dvc and I have them wire to 4 ohms, and have the amp bridged to 4 ohms mono, and it's the amps top! Thanks