Kenwood KL-777D
(1974 - 1977)

Woofer: Aluminium voice coil bobbins for better heat dissipation and power handling, perforated woofer cone cap, a woofer cone made of NBKP and canadian pulp for less cone breakup, long voice coils for linearity, a special acoustic filter in bass-reflex port made of rolled & corrugated PVC which prevents standing waves...
Low-Mid: ALNICO-driven mylar cone cap driver with 200µ aluminium deposit, corrugated edge, aluminium bobbin and long voice-coil
High-mid: mylar horn with Kenwood equalizer very near the mylar film for better high range response
High: pair of ALNICO driven cones with diffusers for wide-angle dispersion
Super-high: aluminium-coated mylar film with ALNICO magnet.

The more the merrier for "an earth-shaking experience in bass realism" !

Close to the earlier KL-777 and KL-7090 firing squads.