Helix Pure R-Series PR K165.2 6.5 Inch 2-way Component Flex-Crossover 100w RMS

The Helix PR K165.2 is a 6.5 inch 2-way component speaker set from the Pure R-Series, rated at 100 W RMS / 200 W max. It pairs a 25 mm coated silk dome tweeter with a 165 mm mica-paper composite woofer and a separable Flex-Crossover.

The set contains the PR T25-S tweeters and PR W165 woofers, which are also available separately. The optional PR ATP25 aluminium tweeter pods are available for surface-mounted tweeter installations.

Key specifications

• Type: 2-way component speaker set
• Woofer: 6.5" / 165 mm mica-paper composite cone, die-cast aluminium basket
• Tweeter: 1" / 25 mm coated silk dome
• Power handling RMS / max: 100 / 200 W
• Impedance: 4 ohms
• Frequency response: 40 Hz to 25,000 Hz
• Sensitivity: 91 dB @ 2.83 V / 1 m (88 dB @ 1 W / 1 m)
• Crossover: separable Flex-Crossover, 12 dB slopes, 3-stage tweeter level adjustment
• Woofer installation depth: 66.5 mm (cut-out 141 mm)

Helix Pure R-Series

The Pure R-Series sits at the top of the Helix Pure speaker range, built for listeners who prioritise sound quality above all else. It combines high-quality materials, precise engineering and a clean, understated aesthetic designed to integrate discreetly into any vehicle interior.

Features

• 2-way premium component system delivering detailed, dynamic sound
• High-efficiency design for distortion-free output, precise highs and strong kick bass
• Elegant, low-profile design for discreet interior integration
• Tweeter
  • 1" / 25 mm coated silk dome tweeter for accurate, natural treble reproduction
  • Compact design with multiple mounting options for flexible installation
  • Includes anodised flush-mount housing with solid mounting ring and two swappable cover grille designs
  • High-grade aluminium tweeter pod (PR ATP25) optionally available
• Woofer
  • 6.5" / 165 mm mica-paper composite cone for punchy kick bass and balanced midrange
  • Rigid die-cast aluminium basket with aerodynamic, flow-optimised design for enhanced impulse response
  • Additional basket ventilation holes for improved voice coil cooling and strong power handling
  • Powerful magnet system for high efficiency and optimised linear magnetic flux
  • Helix grilles included for cone protection
• Flex-Crossover
  • Separable Flex-Crossover suited to vehicles with separate tweeter and woofer mounting locations
  • Extensively tuned high-pass and low-pass filters with 12 dB slope
  • 3-stage tweeter level adjustment to match different mounting positions
  • High-quality components throughout for best possible sound quality

Build quality and design

The PR K165.2 uses premium components chosen for both sonic performance and durability. The die-cast aluminium basket, coated silk dome tweeter and mica-paper composite cone all contribute to an accurate, controlled sound at all volume levels. The clean, timeless design blends into vehicle interiors without drawing attention.

Tweeter performance

The 25 mm coated silk dome tweeter is built to tight manufacturing tolerances, reproducing fine high-frequency detail smoothly and naturally. The anodised aluminium flush-mount housing allows concealed installation, and the two included grille designs offer a choice of finish. The optional PR ATP25 aluminium pod provides a surface-mount alternative.

Woofer performance

The 165 mm mica-paper composite cone delivers strong kick bass and a balanced midrange. The rigid aluminium die-cast basket with its low-turbulence design supports accurate impulse response, while additional ventilation holes keep the voice coil cool during sustained high-power use. Helix grilles are included for cone protection.

Flex-Crossover

The separable Flex-Crossover is designed for installations where the tweeter and woofer are mounted in different locations. The 3-stage tweeter level adjustment allows the treble balance to be fine-tuned to the mounting position, and the 12 dB slopes on both high-pass and low-pass filters have been carefully tuned for the PR K165.2 system.