Power RMS / max. P 150 / 300 Watts
Impedance Z 4 Ω
DC resistance Re 3.4 Ω
Resonance frequency Fs 54 Hz
Mechanical Q factor Qms 11.1
Electrical Q factor Qes 0.55
Total Q factor Qts 0.53
Compliance Cms 490 µm/N
Equivalent air volume Vas 12.4 L
Force factor B*I 6.1 Tm
Efficiency 1 W / 1 m SPL 88 dB
Cone area Sd 135 cm²
Moving mass Mms 17.8 g
Cone material Sisal with elastomer structural damping
Mechanical resistance Rms 0.54 kg/s
Voice coil diameter ø 37 mm
Voice coil winding height 12 mm
Max. linear excursion Xmax +/- 3 mm
Outer diameter ø 166 mm / 6.54″
Installation diameter ø 145 mm / 5.71″
Installation depth 67 mm / 2.64″

Recommended enclosure volumes
Sealed box
Net volume 8 L
Lower limiting frequency (-3dB) 68 Hz

Vented box
Net volume 15 L
Port diameter ø 60 mm / 2.36″
Port area 28 cm²
Port length 16 cm / 6.30″
Port tuning frequency Fb 49 Hz
Lower limiting frequency (-3dB) 52 Hz

Power RMS / max. P 75 / 150 Watts
(highpass > 400 Hz at 24 dB/Oct.)
Impedance Z 4 Ω
DC resistance Re 3.3 Ω
Resonance frequency Fs 130 Hz
Mechanical Q factor Qms 4.72
Electrical Q factor Qes 0.50
Total Q factor Qts 0.45
Compliance Cms 415 µm/N
Equivalent air volume Vas 0.54 L
Force factor B*I 4.4 Tm
Efficiency 1 W / 1 m SPL 86 dB
Cone area Sd 30 cm²
Moving mass Mms 3.7 g
Cone material Glassfiber-paper compound cone
Mechanical resistance Rms 0.63 kg/s
Voice coil diameter ø 25 mm
Voice coil winding height 8 mm
Max. linear excursion Xmax +/- 2 mm
Outer diameter ø 90 mm / 3.54″
Installation diameter ø 73 mm / 2.87″
Installation depth 37 mm / 1.46″

Recommended enclosure volumes
Sealed box with minimum 200 ml net volume
Net volumes Recommended DSP / amplifier settings
0.2 liter (System resonance: 230 Hz) Crossover frequency: 500 Hz
Min. filter slope: 12 dB/Oct.
0.4 liter (System resonance: 190 Hz) Crossover frequency: 450 Hz
Min. filter slope: 18 dB/Oct.
0.6 liter (System resonance: 170 Hz) Crossover frequency: 400 Hz
Min. filter slope: 24 dB/Oct.

Power RMS / max. P 100 / 150 Watts
(highpass > 3,000 Hz at 12 dB/Oct.)
Impedance Z 4 Ω
DC resistance Re 3.4 Ω
Resonance frequency Fs 820 Hz
Efficiency 1 W / 1 m SPL 90 dB
Voice coil diameter ø 25 mm
Cone area Sd 4.9 cm²
Moving mass Mms 0.35 g
Cone material Silk dome
Outer diameter ø 50 mm / 2.00″
Installation diameter ø 44 mm / 1.73″
Installation depth 20.5 mm / 0.81″

Recommended crossover frequencies for the highpass
Slope Minimum crossover frequency
6 dB/Octave 3,500 Hz
12 dB/Octave > 2,500 Hz
24 dB/Octave > 1,800 Hz