my old 95 eclipse, i was running a 12'' digital designs 45 series, in a 3.3 cubic foot slot port box. tunes for 38-50 hz, mark anthony mp40 40 watts by 1 at 4 ohm ( straigth cheater amp) amp made well over 1500 watts, 4g power/ground 12g remote, 8g speaker wire,
hit consistant 144.3 db an nothing rattled!!! roof/windshield flexed but no rattles