i have a 06 nissan altima that im running two 10 inch infinity perfectswired parallel in a sealed box being pushed by a infinity ref611a 600 watt mono amp. it sounds great when the seats are folded down but not so great with the seats up. should i go ported or get bigger subs? i was thinking of going with one 12 inch kicker l7 in a ported box. would this be a louder setup or can anyone suggest another sub setup under $300.00? thanks in advance
