Helix S 4B

Power RMS / max.     P     70 / 140 Watts

Impedance      Z     4 Ω

DC resistance      Re     3.4 Ω

Frequency response           75 Hz - 6,000 Hz

Resonance frequency      Fs     120 Hz

Mechanical Q factor      Qms     4.24

Electrical Q factor      Qes     1.11

Total Q factor     Qts     0.88

Compliance     Cms     232 μm/N

Equivalent air volume     Vas     1.2 L

Force factor      B*I     4.1 Tm

Efficiency 1 W / 1 m     SPL     89 dB

Cone area      Sd     61 cm²

Moving mass      Mms     5.9 g

Cone material           Basalt-fiber-paper compound

Mechanical resistance      Rms     1.19 kg/s

Voice coil diameter     ø     25 mm

Voice coil winding height           12 mm

Max. linear excursion      Xmax     +/- 3 mm

Outer diameter     ø     102 mm / 4.01"

Installation diameter     ø     92.3 mm / 3.63"

Installation depth           46.5 mm / 1.83"

   

Recommended enclosure volumes  

Sealed box  

Net volume           3 L

Lower limiting frequency (-3dB)           100 Hz