i have a sony head deck and factory door speakers. i have the 2 twelves in a sealed box. i was wondering if any of u guys have any suggestions on how i can get my bass louder but still tight and punchy. the mtx amp is anly six hundre watts. i have it bridged at 4 ohm since i dont know if it handles 2 ohm bridged since it is a 2 channel. i had a bandpass but it wasint tight and punchy like sealed. i have a ported u think a should use that box instead of sealed. and if so u think if i get a 1200jbl amp it would sound louder but still be tight.