that shit will be ridiculous, I installed my hdc315 today tuned to 40hz ported through center armrest, sub forward and its ****in silly loud. Im running it off a hcca 5000D.
It puts out 2500 at 1ohm, and I have the gains set a little below half. Im scared to turn them up anymore it feels like im getting punched in the head tuned to 40hz lol.good to hear haha...whats the RMS on that amp
plus i was told by IonSQL that the output will not be effected any diffrent from sub facing forward and sub facing upward he said that the only thing that will be diffrent is more upward trunk flex...