Helix CB K100.2-S3

Helix CB K100.2-S3 – 4″ 2-way component system, 3 Ω

The CB K100.2-S3 is a 100 mm 2-way component set from the COMPOSE BASIC series – the entry line of the HELIX COMPOSE platform, a reworked generation of universal speakers developed in the vehicle for the vehicle. BASIC delivers the essentials for good sound and is matched to HELIX and MATCH amplifiers.

The 3 Ω design brings a noticeable gain in efficiency and sound pressure. The midrange uses a lightweight injected polypropylene cone in a steel basket with ventilation holes, while the 20 mm tweeter combines a coated silk dome with a neodymium magnet and mechanical features for safer connection and professional installation. A compact separate crossover and FlexMount20 compatibility for the tweeter round off the package.

Key Features

• 3 Ω technology: maximises amplifier power output
• Compact design: suits installation in cramped spaces
• 20 mm silk-dome tweeter: coated silk dome for clear, dynamic treble
• Neodymium tweeter magnet: high efficiency with linear magnetic flux
• Flexible tweeter mounting: several mounting options; flush and angle pods included
• FlexMount20 compatible: optional adaptors for the original vehicle tweeter position
• Polypropylene cone: 100 mm lightweight injected polypropylene midrange cone
• Ventilated steel basket: ventilation holes help cool the voice coil
• Powerful magnet system: for good impulse control
• Polyurethane dustcap: tunes the upper-midrange response
• Separate crossover: compact, 4-step tweeter level adjustment, tweeter protection, 12 dB tweeter slope

Drivers & Construction

• Tweeter: 20 mm (0.75″) coated silk dome, neodymium magnet, 20 mm voice coil, ultra-compact, FlexMount20 compatible
• Midrange: 100 mm injected polypropylene cone; polyurethane dustcap; 25 mm voice coil (8.9 mm winding height); steel basket with ventilation holes
• System: 2 tweeters, 2 midrange drivers and 2 separate crossovers (CB FX100.2) form the stereo set

Acoustic Performance

• Power handling: 60 W RMS / 90 W max
• Impedance: 3 Ω (midrange 3 Ω, Re 3.1 Ω; tweeter 4 Ω)
• Sensitivity: 88 dB @ 2.83 V / 1 m; 84 dB @ 1 W / 1 m
• Frequency response: 100 Hz – 22,000 Hz
• Midrange T/S parameters: Fs 116 Hz, Qts 0.81, Qes 0.97, Qms 5.05, Vas 0.9 l, Sd 50 cm², Mms 7.5 g, BL 4.2 Tm, Cms 250 µm/N, Xmax ±2.5 mm
• Tweeter: Fs 2,000 Hz

Crossover

• Type: separate CB FX100.2 crossover, 103.3 × 50.4 × 25.0 mm
• Tweeter section: 12 dB/octave highpass with integrated tweeter protection
• Level adjustment: 4-step tweeter level control
• Tuning: balanced frequency distribution in a compact footprint

Installation Notes

• Midrange: mounting diameter 89.5 mm, mounting depth 48.9 mm, outer diameter 99.2 mm
• Tweeter: mounting and outer diameter 32 mm, mounting depth 9.8 mm; flush and angle pods included
• FlexMount20: optional vehicle-specific tweeter adaptors, e.g. CFMK20 BMW.1, TES.1, TES.2, POR.1, MB.1

Technical Specifications

Scope of Delivery

2 x Tweeter CB T20FM-S
2 x Midrange CB W100-S3
2 x Crossover CB FX100.2
2 x Tweeter mounting accessories
1 x Mounting material