Just finished installing a DC 1.2K running (2) M3 8's.....threw the subs in a quick sealed .75 cube each enclosure....holy hell, it sounded BAD....I KNOW I SCREWED UP using a sealed box, was in a hurry to get them running, so here I am needing enclosure design help. It's in a 2015 Honda Accord EX-L sedan. I'm very handy, can make me own enclosures, have done so many times. I'm an old school audio junkie from way back, just getting back in, used to use a ton of the old school, American made RF power equipment back in the day, now switched to DC.....again please help......i can answer any questions to help