Helix Ci3 K130.2-S3 MK2

Helix Ci3 K130.2-S3 MK2 – 5.25″ 2-way component system, 3 Ω

The Ci3 K130.2-S3 MK2 is a 130 mm 2-way component set 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. The i3 kit is designed for easy integration into cars and is tuned to work with HELIX and MATCH amplifiers, with particular attention to safe connection and operation.

The 3 Ω design lets an amplifier deliver more power and gives a noticeable gain in efficiency and sound pressure. The midbass uses a Cenosphere-coated paper cone in a glass-bead-reinforced polymer basket, while the 20 mm tweeter combines a black aluminium dome with a neodymium magnet. The separate Ci3 FX-UNI.2 crossover, COMPOSE Connect / ProConnect plug-in connections and compatibility with FlexMount20 tweeter adaptors and WireKits make vehicle-specific, non-destructive installation straightforward.

Key Features

• 3 Ω technology: higher efficiency and maximum output from HELIX and MATCH amplifiers
• Automotive-grade connectors: COMPOSE Connect and ProConnect for secure wiring that is protected against polarity mistakes
• 20 mm aluminium tweeter: black aluminium dome that combines low weight with high stiffness for detailed, natural treble
• Neodymium tweeter magnet: refined, highly efficient design for linear magnetic flux
• Flexible tweeter mounting: compact tweeter with flush-mount and angle-mount pods included; FlexMount20 compatible
• Cenosphere midbass cone: 130 mm coated paper cone for precise, detailed reproduction
• Glass-bead reinforced basket: rigid polymer composite that reduces ringing
• Powerful midbass magnet system: for high efficiency and good impulse response
• Polyurethane dustcap: tailors the upper-midrange response
• Separate Ci3 FX-UNI.2 crossover: compact, with 6-step tweeter level adjustment, tweeter protection and a 12 dB tweeter slope
• WireKit ready: optional car-specific WireKits allow connection to the factory harness without cutting wires

Drivers & Construction

• Tweeter: 20 mm (0.75″) black aluminium dome, neodymium magnet, 20 mm voice coil, ultra-compact housing, FlexMount20 compatible
• Midbass: Paper cone with Cenosphere coating – hollow microspheres embedded in a polyamide layer raise stiffness and internal damping while keeping the cone light; polyurethane dustcap; 25 mm voice coil (10.5 mm winding height); ProConnect terminal
• 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
• System: 2 tweeters, 2 midbass drivers and 2 separate crossovers form the stereo set

Acoustic Performance

• Power handling: 90 W RMS / 135 W max
• Impedance: 3 Ω (midbass 3 Ω, Re 3.1 Ω; tweeter 4 Ω)
• Sensitivity: 91 dB @ 2.83 V / 1 m; 87 dB @ 1 W / 1 m
• Frequency response: 80 Hz – 25,000 Hz
• Midbass T/S parameters: Fs 89 Hz, Qts 0.74, Qes 0.97, Qms 3.11, Vas 4.6 l, Sd 98 cm², Mms 9.1 g, BL 4.0 Tm, Cms 350 µm/N, Xmax ±3.2 mm
• Tweeter: Fs 1,800 Hz

Crossover

• Type: separate Ci3 FX-UNI.2 crossover, 103.3 × 50.4 × 25.0 mm
• Tweeter section: 12 dB/octave highpass with integrated tweeter protection
• Level adjustment: 6-step tweeter level control to match the mounting position
• Midbass section: 6 dB lowpass
• Connectivity: compatible with COMPOSE Connect and WireKits

Installation Notes

• Midbass: mounting diameter 116.5 mm, mounting depth 55.4 mm, outer diameter 130 mm
• Tweeter: mounting and outer diameter 32 mm, mounting depth 9.8 mm; flush and angle pods included
• FlexMount20: optional vehicle-specific adaptor rings place the tweeter in the original mounting location (e.g. CFMK20 BMW.1, TES.1, TES.2, POR.1, MB.1)
• COMPOSE Connect: plug-in housings for standard flat plugs – no soldering, polarity reversal prevented
• WireKits: optional locking adaptor cables to the factory harness, e.g. CWK BMW.FX-550CC

Technical Specifications

Scope of Delivery

2 x Tweeter Ci3 T20FM-AL MK2
2 x Midbass Ci3 W130-S3
2 x Crossover Ci3 FX-UNI.2
2 x Lowpass cable crossover Ci3 FX-WLP.2
2 x Tweeter mounting accessories
2 x COMPOSE Connect Kit
1 x Mounting material