If you are aware of the M2 Monitors from the professional side of JBL.
You will discover a whole new world of the D2 Midrange unit.
The 4367 also uses the 2216nd woofer which is very revolutionary itself with at least 5 patents.
Both of these drivers were built from the ground up as entirely new devices.
The 4367 monitors are the only loudspeaker with a passive X-over a consumer can buy.
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