21 "carbon sandwich cone
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: 395 mm
Depth: 180 mm
Voice coil opening : 4" - 101 mm
Weight : 220 gramm +/- 5%