Sounds like you have the power to push that amp??Fine/..Looking at the vid...I see an obstruction in your port area.. thats no bueno! Whats going on with that?I think it may be your enclosure??My SQubed HDS 310s are at 4.06CuFt @32 Htz double baffel before displacement and ran off of a Matts HC 300D@2 ohms, and fused at 60 amps off of a stock 80-90 amp alt with two orileys Superstart AGM group 78s with ELD bypass and big3 with 2 ga,and I dont dip below 12.4v,and it slamms hard enough to move my wiper blades(no need for more power as my roof ripples too much and afraid to crease due to no deadner)..Subs rear port rear about 1'0 from rear.My 12s were at 2.06@32 htz ea(XFL 12s)in my truck double baffle,and needed more room to breathe(hince a wall build coming up)..I think if it were me.. Id do 4.0 per sub after displacement,and tune down to 32 htz..My Opinion for an xfl 15..and do some deadening..you are loosing alot due to not deadening..I am too in my Honda, but atm, Im getting all I can without doing it, but I know I could use more power, but sacrafice will be needed for it..Id start with the enclosure first..especially with no obstruction within that port area..Just my 2 cents..Others may state differently..But those subs are monsters,and deserve to be played to theyre potential.Ive been asked several times if Im running a pair of 15s.LOL..10s, with 1/2 rms power