i have one jl audio w1 12" in a ported enclosure built to manufacture specs and it sounds louder that i thought it would be i was in pressed for only being one 12 ...i would take on jl audio over kicker any day the quality these subs are made with its way better than any other comparable brand not only sound quality but materials there made .. u will hear difference ...i know the w1 says 300 rms but am pushing it with 460 rms just tune ur amp right and it wont hurt the subwoofer at all ..