Okay why does the 300 have a bigger woofer but cost less and then why does the 400 have a smaller woofer but the box isn't ported in the front and it cost more? Is that cost just to add the crossover function on the sub?
Why isn't it ported?
And before you ask I can't afford the 500 model.
For me that is way to much money to spend on a subwoofer.

Thanks

Mits WD-92840
Sony BDP-CX960
Yamaha RX-A3000
Axiomv3 M80's,VP180,QS8s
HSU VTF-3MK4 Sub
PanamaxM5400