he doesnt know what he wants that's why he's just askin how manu subwoofers are thoertically possible in the trunk.... he didnt say he wanted multiple woofers...

a single woofer given enough wattage with the right enclosure might just satisfy his thirst for bass.... it's his call

so for $500 I dont see much of a problem.. and even with 2 woofers and a more powerful us acoustics amp it should run more than $200 more...