Sorry about the grill, must have with 2 year old.........Robert G built these; I asked for utility cabs and he was really fastidious in their construction and tuning. Got a question on JBL stuff? Ask Robert G on the Lansing forum.........he knows da stuff...........
I haven't heard them yet!! Just got them home, have to bring amps out of storage building! He spent much time fine tuning each one.........don't have the data right in front of me but it was like 28-29hz. Optimum for extension without distortion, and yielding the best transient response. MBB