Building a Truck theater system around a Soundstream 5.1 amp for the kids on long trips. The sub channel is rated at 1x200 @ 4ohm, 1x400 @ 2ohm, or 1x500 @ 1ohm. The sub I have is a Infinity Kappa 10 DVC (4ohm). I'm building a seal box around .8ft^3. Can the sub take 400 rms or will I run into problems with durability over time. See I f@ckup and got the kappa instead of the Perfect. I will be pushing the sub 125rms over the rated by Infinity (which is 275), will this work?