I have an L5 in a ported Box. Its a 12" rated at 650rms. Its 4ohm version as right now Im running an old Pyle PLM205 on it bridged at 4ohm. I dont know the eact specs of the Pyle Amp I have but I am assuming 300-400rms watts at 4ohms bridged. I am looking at matching the sub up with a correct amp that will give it a true 650rms at 4ohms. If anyone has an amp for sale capable of this kinda 4ohm output please post your asking price and location.