Helix Ci3 C100.2FM-S3 MK2

Helix Ci3 C100.2FM-S3 MK2 – 4″ 2-way coaxial speaker, 3 Ω

The Ci3 C100.2FM-S3 MK2 is a 100 mm 2-way coaxial speaker from the HELIX COMPOSE i3 line, part of the HELIX COMPOSE platform, a reworked generation of universal speakers that Audiotec Fischer develops in the vehicle for the vehicle, aiming to merge the flexibility of a universal speaker with the fit advantages of vehicle-specific systems. It fits easily into cars and is designed to pair with HELIX and MATCH amplifiers.

The 3 Ω design raises efficiency and maximum sound pressure. A Cenosphere-coated paper cone, a glass-bead-reinforced polymer basket and a shallow neodymium magnet keep the installation depth at just 30 mm, while the coaxial 20 mm black aluminium tweeter delivers detailed highs. The FlexConnect terminal and FlexMount100 twist-lock adaptor rings allow direct connection to the original harness and fitting in the vehicle’s original mounting location.

Key Features

• 3 Ω technology: higher efficiency for more amplifier output
• FlexConnect terminal: automotive-grade connection for quick, secure hook-up, including direct connection to the factory harness via car-specific adaptors, with reverse polarity protection
• 20 mm aluminium tweeter: black aluminium dome with neodymium magnet, light yet rigid, for natural brilliance and fine detail
• Cenosphere cone: 100 mm coated paper cone for precise, detailed reproduction
• Glass-bead reinforced basket: polymer composite that resists flexing and ringing
• Shallow neodymium magnet: enables a low installation depth of 30 mm
• Integrated crossover: 6 dB highpass for the tweeter
• FlexMount100: car-specific twist-lock adaptor rings for an optimised fit in the original mounting position

Drivers & Construction

• Tweeter: coaxial 20 mm (0.75″) black aluminium dome, neodymium magnet, 20 mm voice coil
• Midrange: Paper cone with Cenosphere coating – hollow microspheres embedded in a polyamide layer raise stiffness and internal damping while keeping the cone light; neodymium magnet; 25 mm voice coil (4.8 mm winding height); FlexConnect terminal; FlexMount100 compatible
• Basket: Polymer composite basket reinforced with glass beads – rigid, low in self-resonance, reduces flux modulation of the magnet system, heat-resistant and compact for tight mounting spaces

Acoustic Performance

• Power handling: 80 W RMS / 120 W max
• Impedance: 3 Ω (Re 3.0 Ω)
• Sensitivity: 91 dB @ 2.83 V / 1 m; 87 dB @ 1 W / 1 m
• Frequency response: 100 Hz – 25,000 Hz
• T/S parameters: Fs 137 Hz, Qts 0.66, Qes 0.78, Qms 4.37, Vas 2.1 l, Sd 57 cm², Mms 3.0 g, BL 3.2 Tm, Cms 456 µm/N, Xmax ±2.0 mm

Crossover

• Type: integrated in the speaker
• Tweeter: 6 dB highpass

Installation Notes

• Dimensions: outer diameter 98 mm, mounting diameter 89 mm, mounting depth 30 mm
• FlexMount100: vehicle-specific twist-lock adaptor rings, e.g. CFMK100 BMW.1, BMW.2, TES.1, MB.1, JLR.1, VOL.1
• FlexConnect: inlays and car-specific wire kits such as CWK FX.M-550CC and CWK POR2.M-225FC connect to the original harness
• Other accessories listed: CiA SG100

Technical Specifications

Scope of Delivery

2 x Ci3 C100.2FM-S3 MK2
2 x Universal FlexMount100 (with standard 4-point mounting)
2 x FlexConnect inlay A
2 x Universal connection cable
1 x Mounting material