I currently have on Hsu VTF-2 in my room & after hearing my friends dual VTF-2 setup, I decided I must make an improvement on my setup. The only problem I have with going dual vtf-2s is that the 2 subs would have to sit next to eachother in the same corner(I can afford to space them about 1.5 feet apart)-I have no other spot in the room to locate the 2nd sub-only spot is in the same corner with the original hsu. Would you recommend doing this? or should i go with a single sub that will perform better than my vtf-2(are ther any for a reasonable price?)? Also, why do multiple subs of the exact same make sound better than a single sub?