IB4 is JL's free-air sub, comes in only 8 and 10 inch.m3dia_lab said:what is that i am a jl freak and i never herd of that....
jl make a W-? unless your talking about a mid- bass driver?
which jl sub requires the smallest box? w1,wo,w6? thanksTL said:IB or free air = quiet... Build a small box and you'll be much happier.