Features
- Long stroke design
- Linear high stability suspension
- Higher shore hardness rubber surround
- Dual 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 2 x 3 Ω
- DC resistance, Re 2 x 2.5 Ω
- Voice coil inductance, Le(par./ser.) 1.4/6.1 mH
- Effective piston area, Sd 458 cm2
- Voice coil diameter 75.5 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 7.7 kg
- Free air resonance, Fs 27.5 Hz
- Sensitivity (2.83V/1m) 90/85 dB
- Mechanical Q-factor, Qms 5.62
- Electrical Q-factor, Qes 0.52
- Total Q-factor, Qts 0.48
- Moving mass incl. air,Mms 231 g
- Force factor, Bl(par./ser.) 9.7/19.5 Tm
- Equivalent volume, Vas 43 liters
- Compliance, Cms 0.14 mm/N
- Mechanical loss, Rms 7.1 kg/s
- Rated power handling* 300 W
* IEC 268-5, T/S parameters measured on drive units that are broken in.
