well the w6 and the w3 are very closely related, the only real difference is the vrc (vented reinforced coil), makes the subs stronger, they perform beautifully in sealed enclosures.. its all about the sound you want, i have a 12 in a 1.250 cubic foot box, on jls spec books thats rated at a+ for sound .. and i have to admit sounds good, but a bit too much, im aiming for a w7 now.. =)
one love
babir
but i dunno if id recommend a bandpass enclosure with a w3 to anyone.. nah