Features
- Hard paper cone for improved piston operation (made in-house)
- Large optimized motor system with under-cut pole piece and dual shorting rings
- Vented aerodynamic cast aluminium chassis for optimum strength and low compression
- Soft low damping rubber surround for optimum transient response
- Linear symmetric suspension design for improved dynamic performance
- Non-conducting fibre glass voice coil former for minimum damping
- Long life silver lead wires attached 180° apart for improved stability
- Vented pole piece 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 3.3 Ω
- Voice coil inductance, Le 0.29 mH
- Effective piston area, Sd 255 cm2
- Voice coil diameter 49.5 mm
- Voice coil height 23 mm
- Air gap height 6 mm
- Linear coil travel (p-p) 17 mm
- Magnetic flux density 1.1 T
- Magnet weight 1.36 kg
- Net weight 3.7 kg
- Free air resonance, Fs 28 Hz
- Sensitivity (2.83V/1m) 91 dB
- Mechanical Q-factor, Qms 6.7
- Electrical Q-factor, Qes 0.42
- Total Q-factor, Qts 0.40
- Moving mass incl. air,Mms 42 g
- Force factor, Bl 7.6 Tm
- Equivalent volume, Vas 71 liters
- Compliance, Cms 0.77 mm/N
- Mechanical loss, Rms 1.1 kg/s
- Rated power handling* 90 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.
