ScanSpeak 15M/4531K Revelator

[LDS]

Resonant frequency fS 35 Hz
Electrical Q QES 0.24
Mechanical Q QMS 4.80
Total Q factor QTS 0.23
Suspension equivalent air volume VAS 23.8 litres
DC resistance RE 3.5 Ω
Minimum impedance Zmin 4.2 Ω
Maximum impedance Zmax 73.5 Ω
Voice coil inductance LE 0.17 mH
Force factor B·l 6 T·m
Suspension mechanical resistance RMS 0.5 N·s/m
Suspension mechanical compliance CMS 1880 µm/N
Moving mass MMD 10.3 g
Moving mass (including airload) MMS 11 g
Surface of the diaphragm SD 95 cm²
Effective diaphragm diameter Ø 11 cm
Maximum linear excursion Xmax ± 3 mm
Excursion limit Xlim ± 8 mm
Displacement volume at Xmax VD 28.5 cm³
Efficiency η₀ 0.42 %
Efficiency bandwidth product EBP 145


Net weight 1.7 kg
Frame material Aluminium
Diaphragm material Sliced Paper
Diaphragm shape Cone
Voice coil diameter 38 mm
Voice coil height (HVC) 11 mm
Magnet Ferrite
Air gap height 5 mm