First I'd like to point out that if you research this product you'd known that it's actually a dual 4ohm voice coil 300 watt rms sub. Anyway, I'm running a single sub off a Pioneer mono amp and this thing pounds. I have it in a 0.84 cuft ported box although I tried sealed first and that was ok, sealed probably sounds better in a trunk but I have a hatchback. It's built pretty solid too. I bet running 2+ of these would be amazing. Btw, onlinecarstereo.com had this $30 cheaper than other online dealers.