18 "carbon sandwich cone glued together with a BIG Roll surround.
Ideal for SPL applications, but also for music listeners.
Because of the sandwich structure, the membrane is extremely stiff, but thanks to the inner foam layer, it is also ideal for musick.
Number of layers: 3
Overall diameter: 331 mm
Depth: 90 mm
Voice coil opening : 3" - 78 mm
overall diameter : 455mm
inner diameter : 315mm
height : 35mm