I have owned two 10' alpine type r's (4 ohms) for the past year and a half, but purchased two kicker amps that have only been powering it at about 300-350rms, wen the sub goes 500 rms each, 1500 max. I was looking at purchasing two Alpine MRP-500's, but they only give 300 wats rms for 4 ohms. Is...