600Wrms continuous power handling (measured to AES Standard)
Flexirol™ technology for greater excursion control
Saturated gap technology for lower harmonic distortion
Extremely low frequency response, down to 30Hz
Smart chassis design minimises acoustic distortion
Specially treated weather-resistant cone

General specifications
Nominal diameter (mm/in) 457/18
Power Rating (AES, W rms) 600
Nominal impedance (?) 8
Voice coil diameter (mm/in) 100/4
Magnet type Ferrite
Magnet weight (kg/oz) 3.1/110
Chassis type Cast aluminium
Sensitivity (dB) 97
Frequency range (Hz) 30-3000
Coil material Round copper
Former material Glass fibre
Cone material Glass loaded paper with weather resistant impregnation
Surround material Cloth-sealed
Suspension Single
Xmax (mm/in) 6.0/0.24
Gap depth (mm/in) 10.0/0.39
Voice coil winding width (mm/in) 22.0/0.87

Small Signal Parameters
D (m/in) 0.38/14.96
Fs (Hz) 32.7
Mmt (g/oz) 158.22/5.58
Mmd (g/oz) 136.61/4.82
Mair -
Qms 5.24
Qes 0.32
Qts 0.30
Re (?) 5.31
Vas (lt/ft3) 271.99/9.6
BI (Tm) 23.31
Cms (mm/N) 0.15
Rms (kg/s) 6.21
Le (mH) 1.46

Mounting Information
Overall diameter (mm/in) 462/18.19
Overall depth (mm/in) 205/8.07
Cut-out diameter (mm/in) 416/16.38
Mounting slot dimensions (mm/in) 7 x 10/0.28 x 0.39
Number of mounting slots 8
Mounting slot PCD range (mm/in) 429-440/16.89-17.32
Unit weight (kg/lb) 9.7/21.4