i built a sealed box a while ago for 4 jl w3s seperate chambers to the (almost exact) specs 1.138 after a .07 displacment but now i cant bring myself to spend over a grand on 4 new subs, not sure if i trust ebays half priced stuff. anybody know dcs lvl 2 or 3s displacement? im using 2 jl 500/1s and im thinking lvl 2 or 3 might work in my box with a bit of cash left over.......