I have a Dx-12 in a .85 cu ft box with a 250W amp... it sounds OK, but when I put the Dx on my brother's sub box (about 1.5 cu ft) the sub hit deeper and harder!!!
The Dx sounded just as loud as my brother's MTX Blue Thunders (2 12" rated as 500W each) and I was using only 250W from one of his amps...!
Does this make any sense? Should I build a bigger box since I'm underpowering the sub? If so what dimensions?
(please excuse my bad english :D )
I need your advice Polk Gurus!