Power RMS / max.

P

200 / 400 Watts

Impedance 

Z

4 x 3 Ω

DC resistance 

Re

4 x 2.7 Ω

Frequency response

Resonance frequency 

Fs

37 Hz

Mechanical Q factor 

Qms

5.40

Electrical Q factor 

Qes

0.57

Total Q factor

Qts

0.51

Compliance

Cms

341  µm/N

Equivalent air volume

Vas

23 L

Force factor 

B*I

7.5 Tm

Efficiency 1 W / 1 m

SPL

87 dB

Cone area 

Sd

222 cm²

Moving mass 

Mms

53 g

Cone material

Hand-scooped paper cone

Mechanical resistance 

Rms

3.3 kg/s

Voice coil diameter

ø

50.8 mm

Voice coil winding height

21 mm

Max. linear excursion 

Xmax

+/- 6.5 mm

Outer diameter

ø

212 mm / 8.35"

Installation diameter

ø

183 mm / 7.2"

Installation depth

105 mm / 4.1"

Recommended enclosure volumes

Sealed box

 Not recommended

Net volume

- 

Lower limiting frequency (-3dB)

- 

DSP settings

- 

Vented box

Net volume

10 L

Port diameter

ø

60 mm / 2.36"

Port area

28 cm²

Port length

25 cm / 9.84"

Port tuning frequency

Fb

47 Hz

Lower limiting frequency (-3dB)

45 Hz