Features
- Vented aerodynamic cast aluminium chassis for optimum strength and low compression
- Proprietary cone material with EGYPTIAN PAPYRUS™ fibres made in-house
- Soft low damping rubber surround for optimum transient response
- Advanced BIMAX spider for improved linearity
- Powerful optimized low distortion neodymium motor system
- Non-conducting fibre glass voice coil former for minimum damping
- Extended copper sleeve on pole piece for low inductance and reduced distortion
- CCAW voice coil for reduced moving mass
- Long life silver lead wires attached 180° apart for improved stability
- Vented pole piece and coil former for reduced compression
- Low piston to chassis diameter ratio
- Gasket and bolt hole protrusions for reduced coupling to speaker cabinet
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.8 Ω
- Voice coil inductance, Le 0.13 mH
- Effective piston area, Sd 70 cm2
- Voice coil diameter 30.5 mm
- Voice coil height 15 mm
- Air gap height 5 mm
- Linear coil travel (p-p) 10 mm
- Magnetic flux density 1.08 T
- Magnet weight 0.1 kg
- Net weight 0.78 kg
- Free air resonance, Fs 41 Hz
- Sensitivity (2.83V/1m) 89 dB
- Mechanical Q-factor, Qms 3.71
- Electrical Q-factor, Qes 0.29
- Total Q-factor, Qts 0.27
- Moving mass incl. air,Mms 7.2 g
- Force factor, Bl 4.9 Tm
- Equivalent volume, Vas 14.6 liters
- Compliance, Cms 2.09 mm/N
- Mechanical loss, Rms 0.5 kg/s
- Rated power handling* 40 W
* IEC 268-5, T/S parameters measured on drive units that are broken in
