Helix Compose CB C570.2-S3 – 5″x7″ Coaxial Speakers

HELIX CB C570.2-S3

Overview

A 2-way coaxial speaker system designed for clarity, efficiency, and balanced sound reproduction. The HELIX COMPOSE series combines durable materials with smart engineering to achieve reliable performance and straightforward installation in a wide range of vehicles.

Essential sound performance

The BASIC series provides everything needed for a clear and dynamic listening experience. Each component is tuned to work together seamlessly, ensuring stable performance and consistent sound output when paired with HELIX or MATCH amplifiers.

High efficiency

Built with 3 Ohm technology, this system ensures better power handling and improved output from compatible amplifiers. The result is noticeable sound enhancement and higher sound pressure levels without compromising clarity.

Deep and accurate bass

The midbass driver delivers a strong and detailed low-end response. Its lightweight polypropylene cone enhances sound accuracy, while the ventilated steel basket improves cooling and durability. A powerful magnet system contributes to better impulse control and responsiveness, and the polyurethane dustcap helps maintain smooth midrange frequencies.

Detailed high frequencies

The 0.75” (20 mm) tweeter uses a coated silk dome for refined, distortion-free treble. Combined with a neodymium magnet, it produces crisp highs and a balanced sound signature that complements the midbass performance.

Features

• 2-way coaxial speaker system offering efficient power handling and balanced audio output

• 3 Ohm impedance for optimized amplifier performance

• Compact design suitable for installation in limited spaces

Tweeter

• 0.75” / 20 mm coated silk dome tweeter for smooth, accurate high-frequency response

• Neodymium magnet for enhanced magnetic control and sensitivity

Midbass

• 5” x 7” / 130 x 180 mm polypropylene cone for accurate and dynamic midrange and bass reproduction

• Ventilated steel basket for improved cooling and power handling

• Strong magnet system ensures precise and quick bass response

Crossover

• Integrated crossover with 6 dB slope for seamless frequency transition

  Technical data

  Power handling RMS / Max.	P	70 / 105 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	228.8 x 144.0 mm / 9.01 x 5.67”
  Installation diameter	ø	181.5 x 125.5 mm / 7.15 x 4.94”
  Installation depth		58.4 mm / 2.30”
  Midrange
  Impedance	Z	3 Ω
  DC resistance	Re	3.0 Ω
  Resonance frequency	Fs	67 Hz
  Mechanical Q factor	Qms	3.64
  Electrical Q factor	Qes	1.04
  Total Q factor	Qts	0.81
  Compliance	Cms	399 μm/N
  Equivalent air volume	Vas	12.4 L
  Force factor	B*l	4.2 Tm
  Cone area	Sd	149 cm2
  Moving mass	Mms	14.3 g
  Mechanical resistance	Rms	1.64 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