Helix Compose CB C165.2-S3 – 6.5″ Coaxial Speakers

HELIX CB C165.2-S3

Overview

A 2-way coaxial speaker system designed for clear and balanced sound reproduction in modern vehicles. The HELIX COMPOSE series blends universal speaker functionality with the benefits of vehicle-specific design, using durable materials and efficient engineering to deliver consistent sound quality and performance.

Performance highlight

The BASIC component systems serve as an ideal entry point into the HELIX COMPOSE lineup, offering all the key features required for a high-quality in-car sound experience. Each element is carefully matched to work seamlessly with HELIX and MATCH amplifiers, ensuring steady performance and reliable power handling.

High efficiency

Built with efficient 3 Ohm technology, the COMPOSE series works perfectly with HELIX and MATCH amplifiers, achieving higher sound output and improved power use. Select models are also available in 2 Ohm versions for even greater performance when paired with compatible amplifiers.

Powerful bass – always consistent

The midbass driver in the BASIC series combines low weight with solid structure to produce clear, powerful bass. Its polypropylene cone provides excellent control and stability, while additional basket ventilation supports heat management. The strong magnet system ensures fast response and precise low-frequency performance. Its compact build allows easy installation even in smaller spaces.

Detailed high-frequency performance

The BASIC tweeter uses a coated silk dome along with a neodymium magnet to produce smooth, detailed highs and consistent clarity across the frequency range, ensuring a natural and pleasant listening experience.

Features

• 2-way coaxial speaker system offering strong efficiency and clean audio

• 3 Ohm impedance for enhanced amplifier output

• Compact design allows simple installation in limited spaces

Tweeter

• 0.75” / 20 mm silk dome tweeter for accurate treble response

• Neodymium magnet for efficient magnetic performance

Midbass

• 6.5” / 165 mm midbass with polypropylene cone for durable and accurate sound

• Sturdy steel basket with ventilation holes for better cooling and handling

• Powerful magnet system for precise impulse response

Crossover

• Integrated crossover with 6 dB slope

  Technical data

  Power handling RMS / Max.	P	80 / 120 Watts
  Frequency response		60 Hz – 22,000 Hz
  Impedance	Z	3 Ω
  Sensitivity	SPL	92 dB @ 2.83V / 1m 88 dB @ 1W / 1m
  Outer diameter	ø	166.0 mm / 6.54”
  Installation diameter	ø	143.0 mm / 5.63”
  Installation depth		61.4 mm / 2.42”
  Midrange
  Impedance	Z	3 Ω
  DC resistance	Re	3.0 Ω
  Resonance frequency	Fs	65 Hz
  Mechanical Q factor	Qms	4.78
  Electrical Q factor	Qes	0.93
  Total Q factor	Qts	0.78
  Compliance	Cms	480 μm/N
  Equivalent air volume	Vas	12.9 L
  Force factor	B*l	4.1 Tm
  Cone area	Sd	139 cm2
  Moving mass	Mms	12.5 g
  Mechanical resistance	Rms	1.09 kg/s
  Voice coil diameter	ø	25 mm
  Voice coil winding height		8.9 mm
  Max. linear excursion	Xmax	+/- 2.5 mm
  Tweeter
  Voice coil diameter	ø	20 mm
  Features
  Tweeter		Silk dome and neodymium magnet
  Midbass		Injected polypropylene cone
  Crossover		Integrated, 6 dB highpass