Data Sheet

1. 2 hours test made with continuous pink noise signal (6 dB crest factor) within the
range Fs-10Fs. Power calculated on rated minimum impedance. Loudspeaker in free
air.
2. Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
3. Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.
4. Thiele-Small parameters are measured after a high level 20 Hz sine wave
preconditioning test.
Specifications
Nominal diameter
320 mm
(12.0 in)
Nominal impedance 8 Ω
Minimum
impedance
6.7 Ω
Nominal power
handling
1
250 W
Continuous power
handling
2
500 W
Sensitivity (1W/1m)
3
101.0 dB
Frequency range
50 - 4000
Hz
Voice coil diameter
65 mm (2.5
in)
Winding material Aluminium
Former material Glass Fibre
Winding depth
12 mm (0.5
in)
Magnetic gap depth
7 mm (0.28
in)
Flux density 1.4 T
Design
Surround shape Triple Roll
Cone shape Exponential
Magnet material Ferrite
Design
Spider Single
Pole design Straight Pole
Woofer cone
treatment
None
Recommended
enclosure
31.0 dm
3
(1.1
ft
3
)
Recommended
tuning
85 Hz
Parameters
4
Fs 51 Hz
Re 5.8 Ω
Qes 0.19
Qms 7.6
Qts 0.18
Vas
101.0 dm
3
(3.56 ft
3
)
Sd
522.0 cm
2
(80.9 in
2
)
η₀ 6.8 %
Xmax 2.8 mm
Xvar 5.0 mm
Mms 37 g
Bl 19.1 Txm
Parameters
Le 1.2 mH
EBP 268 Hz
Mounting And Shipping Info
Overall
diameter
315 mm (12.4 in)
Bolt circle
diameter
296 mm (11.6 in)
Baffle cutout
diameter
282.0 mm (11.1
in)
Depth 135 mm (5.3 in)
Flange and
gasket
thickness
15 mm (0.59 in)
Air volume
occupied by
driver
3.1 dm
3
(0.11
ft
3
)
Net weight 7.6 kg (16.7 lb)
Shipping
weight
8.4 kg (18.7 lb)
Shipping box
380x380x180
mm (15x15x6.7
in)
Service Kit
RCK012PE328