• PR21620
  • DE 29323089


HELIX PURE R-series: Flawless sound, pure excellence

HELIX PURE transcends beyond mere music. It's an audiovisual journey, dedicated to uncompromising sound quality and uniqueness, designed for discerning audiophiles and individualists who refuse to make compromises in their daily life. The PURE R-Series represents the pinnacle of our PURE speakers, combining their essential features to perfection: uncompromising sound quality, high-quality materials and unparalleled aesthetics.

A sound experience that you can hear and feel

The HELIX PR 165 premium woofer is an example of absolute excellence within the PURE speaker lineup. It delivers unparalleled sound quality that you can hear but also feel. The stiff Mica-Paper composite cone ensures not only a punchy kickbass but also delivers a balanced midrange reproduction that brings your music to life. To achieve optimal impulse response, it utilizes an exceptionally powerful magnet system while the rigid aluminum diecast basket with streamlined, low-turbulence design guarantees ideal impulse fidelity. Furthermore, additional ventilation holes in the basket enhance coil cooling and enable impressive power handling. Always included: HELIX grilles for the ideal protection of the cones.


  • 6.5” / 165 mm premium woofer with stiff mica-paper composite cone for powerful kick bass and balanced midrange response
  • Rigid die-cast aluminum basket with aerodynamic, flow-optimized design for optimized impulse response
  • Basket with additional ventilation holes for improved cooling of the voice coil for impressive power handling
  • Powerful magnet system for high efficiency and optimized linear magnetic flux
  • Including discrete HELIX grilles for the ideal protection of the cones

Technical data

Power handling RMS / Max. P
100 / 200 Watts
Impedance  Z 4 Ω
DC resistance  Re 3.1 Ω
Frequency response   40 Hz - 4,000 Hz
Resonance frequency  Fs 57 Hz
Mechanical Q factor  Qms 5.35
Electrical Q factor  Qes 0.63
Total Q factor Qts 0.57
Compliance Cms 440 µm/N
Equivalent air volume Vas 10.8 L
Force factor  B*I 6.1 Tm
Sensitivity SPL 91 dB @ 2.83 V / 1m
88 dB @ 1W / 1m
Cone area  Sd 133 cm²
Moving mass  Mms 17.9 g
Cone material   Mica-Paper composite cone
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 166 mm / 6.54"
Installation diameter ø 141 mm / 5.55"
Installation depth   66.5 mm / 2.62"

Scope of delivery

2 x Woofer PR W165
2 x Grille
1 x Mounting material

Knowledge Base
Visit Knowledge Base
Product questions?
To the form
Find a distributor