P 5B

SKU: P821500


Midbass 5.25″ 80W


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 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


SKU: P821500 Category: Tags: , , , ,

Speakers Type (Car)



Technical data

Power RMS / max. 80 / 160 Watts
Impedance 4 Ω
DC resistance 3.5 Ω
Frequency response 60 Hz – 5,500 Hz
Resonance frequency 71 Hz
Mechanical Q factor  5.82
Electrical Q factor 0.47
Total Q factor 0.44
Compliance 522 μm/N
Equivalent air volume 4.5 L
Force factor  5.6 Tm
Sensitivity 1 W / 1 m 89 dB
Cone area 79 cm²
Moving mass  9.6 g
Cone material Glassfiber-paper compound
Mechanical resistance  0.73  kg/s
Voice coil diameter 25 mm
Voice coil winding height 12 mm
Max. linear excursion  +/- 3 mm
Outer diameter 128.5 mm / 5.10″
Installation diameter 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 50 mm / 2″
Port area 20 cm²
Port length 12 cm / 4.72″
Port tuning frequency 61 Hz
Lower limiting frequency (-3dB) 55 Hz




Product Datasheet