you guys think a 10 cu ft box ported tuned anywhere from like 30-34 is alot? i was talking to a guy about him builing me a box casue i dont wanna get into making one. he said around 10 cu ft. tho its also going in the back of a suv. but do you guys think thats alot for just a single 18 bl running off a hifonics 2k watt.im not gonna be giving it to much probly arounf 1200 to 1600 its got pf chamber and cooling -thanks