Hello everybody just got a single Sundown E-15 v.3 and putting it in a 4.00 cu ft slot ported box with a Hifonics BRX1116.1D 1100 watt amp should bump preety good. The last system i had was not vary good i had two pyle 12s 250 watt rms subs with a 1000 watt crunch amp one of them stoped working after about 4 months.