Wattage too low or too high? Help

[Aidanskatez]

I have two rockford fosgate P2D4-12's but one is an older model rated at 250 rms and a newer one rated at 400 rms. I have them both in a sealed box. I'm going to hook them up to a planet audio 1500 watt monoblock amp. If I hook them up at 4 ohms and feed the subs about 500 watts, will both of the subs be ok? Will the power split evenly between the subs? Will the 400 rms sub be under powered? Sorry for all the questions. Thanks.

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[garychoffmann 10+ year member]

Run them at 1 ohm. Amp only does about 400 watts