P 5B

Like its larger brother P 6B the P 5B is really an exceptional mid-woofer and the perfect... more

Like its larger brother P 6B the P 5B is really an exceptional mid-woofer and the perfect choice if you like to build up a reference sound system. Its unique glassfiber-paper compound cone combines minimum weight with maximum stiffness and perfect inner damping. A lightweight, temperature-stable 1-inch / 25mm voice coil in combination with the long-throw rubber surround directly transform amplifier power into sound pressure with lowest possible distortion.

Novel glassfiber-paper compound cone for maximum stiffness combined with lowest moving... more
  • Novel glassfiber-paper compound cone for maximum stiffness combined with lowest moving mass and perfect inner damping
  • Special shaped rubber surround for long linear cone excursion
  • Gold-plated terminals
  • Individual HELIX design basket
  • Solid rubber magnet protection ring with HELIX logo
  • Grille included
Power RMS / max.  P 80 / 160 Watts Impedance  Z 4... more
Power RMS / max.  P 80 / 160 Watts
Impedance  Z 4 Ω
DC resistance  Re 3.5 Ω
Resonance frequency  Fs 71 Hz
Mechanical Q factor  Qms 5.82
Electrical Q factor  Qes 0.47
Total Q factor Qts 0.44
Compliance Cms 522 μm/N
Equivalent air volume Vas 4.5 L
Force factor  B*I 5.6 Tm
Efficiency 1 W / 1 m SPL 89 dB
Cone area  Sd 79 cm²
Moving mass  Mms 9.6 g
Cone material   Glassfiber-paper compound
Mechanical resistance  Rms 0.73 kg/s
Voice coil diameter ø 25 mm
Voice coil winding height   12 mm 
Max. linear excursion  Xmax +/- 3 mm
Outer diameter ø 128.5 mm / 5.10"
Installation diameter ø 111 mm / 4.37"
Installation depth   62.5 mm / 2.46"
   
Recommended enclosure volumes  
Sealed box  
Net volume   5 L
Lower limiting frequency (-3dB)   90 Hz
   
Vented box  
Net volume   9 L
Port diameter ø 50 mm / 2"
Port area   20 cm²
Port length   12 cm / 4.72"
Port tuning frequency Fb 61 Hz
Lower limiting frequency (-3dB)   55 Hz
2 x Mid-woofer HELIX P 5B 2 x Mounting ring 2 x Grille 1 x Mounting material more

2 x Mid-woofer HELIX P 5B
2 x Mounting ring
2 x Grille
1 x Mounting material