These are very good subs, pretty much shares a similar cone as the W7 but stucture is that of the w3v2. I have no idea why they made it a SVC no felxibility, although it does come in a single 2 ohm version which is nice but it handles the same amount rms wattage as the W3v2. All in all I have not tested the woofer but have seen them perform they impressed me but i dont think there that much of an upgrade over the W3v2s besides the cone and alot pricer, they do have more ability for more output spl wise but imo sound quality was not as good as the w3v2 but once I get some on hand which I should I will let you know soon it might of just been his install.