Hi Sam -that woof can work with f10@50 (~86dB @50) in a 2.2cu.ft. sealed box - no stuffing - BB4 is ~7.5cu.ft. with bump cause tuned to fs - think yu could tune a bit lower and use lotsa fiberglass loining 'ala VMPS to get rid of bump but still keep some cone damping in 28-42hz region - Rex said it sounded better than 3677 woof - what 15" is in that one? - am confused by JBL export drivers
Freddy