Specifications
Nominal diameter 320 mm (12.0 in)
Nominal impedance 8 Ω
Minimum impedance 6.7 Ω
Nominal power handling1 250 W
Continuous power handling2 500 W
Sensitivity (1W/1m)3 98.0 dB
Frequency range 55 - 3000 Hz
Voice coil diameter 64 mm (2.5 in)
Winding material Aluminium
Former material Glass Fibre
Winding depth 14 mm (0.55 in)
Magnetic gap depth 8 mm (0.31 in)
Flux density 1.3 T
Design
Surround shape Double Roll
Cone shape Exponential
Magnet material Ceramic
Design
Spider Single
Pole design T-Pole
Woofer cone treatment WP Waterproof Front
Side
Recommended
enclosure 40.0 dm3 (1.4 ft3)
Recommended tuning 55 Hz
Parameters4
Fs 55 Hz
Re 5 Ω
Qes 0.32
Qms 3.5
Qts 0.29
Vas 64.0 dm3 (2.26 ft3)
Sd 522.0 cm2 (80.9 in2)
η₀ 3.6 %
Xmax 5.0 mm
Xvar 5.0 mm
Mms 47 g
Bl 15.5 Txm
Parameters
Le 1.0 mH
EBP 171 Hz
Mounting And Shipping Info
Overall diameter 315 mm (12.4 in)
Bolt circle diameter 298 mm (11.7 in)
Baffle cutout
diameter 283.0 mm (11.1 in)
Depth 136 mm (5.35 in)
Flange and gasket
thickness 13 mm (0.51 in)
Air volume occupied
by driver 3.0 dm3 (0.1 ft3)
Net weight 5.6 kg (12.3 lb)
Shipping weight 6.2 kg (13.7 lb)
Shipping box 340x340x170 mm
(13.4x13.4x6.7 in)
Service Kit
Replacement
diaphragm RCK12FW648
