Features
- Long stroke design
- Linear high stability suspension
- Low damping rubber surround
- 3’’ copper voice coil
- Non-conducting reinforced fibre glass coil former
- Very stiff hard paper cone (made in-house)
- Vented cast aluminium chassis
- Large vented motor system and vented coilformer
- Long life silver lead wires
Specs
- Nominal Impedance 4 Ω
- DC resistance, Re 3.5 Ω
- Voice coil inductance, Le 5.3 mH
- Effective piston area, Sd 458 cm2
- Voice coil diameter 76 mm
- Voice coil height 38 mm
- Air gap height 8 mm
- Linear coil travel (p-p) 30 mm
- Magnetic flux density 0.62 T
- Magnet weight 2.4 kg
- Net weight 7.68 kg
- Free air resonance, Fs 19 Hz
- Sensitivity (2.83V/1m) 85 dB
- Mechanical Q-factor, Qms 8.6
- Electrical Q-factor, Qes 0.34
- Total Q-factor, Qts 0.33
- Moving mass incl. air,Mms 266 g
- Force factor, Bl 18.0 Tm
- Equivalent volume, Vas 78.5 liters
- Compliance, Cms 0.26 mm/N
- Mechanical loss, Rms 3.7 kg/s
- Rated power handling* 300 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.
