• CI21400
  • DE 29323089

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HELIX COMPOSE. The perfect speaker for any composition. 

Born out of the increasingly demanding challenges of modern automobile technology and the HELIX-typical pursuit of intelligent solutions, we made the progressive redesign of proven universal speaker systems our mission. The result: our innovative HELIX COMPOSE platform that, according to the motto "developed inside the vehicle, for the vehicle", combines classic universal speakers with the advantages of vehicle-specific systems. Innovative materials and the latest technologies paired with smart, practical engineering - the best of both worlds in harmony: high efficiency, fantastic sound quality and enormous dynamics that fit in any vehicle. HELIX COMPOSE - universal speakers evolved.

Price-performance highlight 

Our HELIX COMPOSE i3 series is an absolute price-performance highlight, providing a first-class sound experience thanks to high-quality components and smart engineering. As you already know from our i7 series, our new mechanical technologies with unbeatable practical benefits, are implemented here as well. All speaker impedances are perfectly matched for the combination with our HELIX and MATCH amplifiers, guaranteeing maximum performance at any time.

High efficiency

HELIX COMPOSE equals smart engineering and accordingly implements highly efficient 3 Ohm technology, that perfectly harmonizes with all HELIX and MATCH amplifiers and at the same time allows a clearly perceptible plus in efficiency and maximum sound pressure.

Cenosphere paper cone

With the innovative "Cenosphere" coating, hollow spheres are incorporated into a polyamide layer that is applied to the cone. This process increases the stiffness and also optimizes its internal damping. The result is an exceptionally stable yet lightweight cone that offers outstanding precision in sound reproduction.

High-tech polymer basket

All HELIX COMPOSE i7 and i3 speaker baskets are made of a high-tech polymer composite, which has been additionally reinforced with glass spheres. The result: maximum stability with minimal self-resonance, while also eliminating flux modulation of the magnetic system and maximum resistance to thermal influences. Last but not least, this allows for much more compact basket dimensions and thus simplified installations in cramped installation conditions.

FlexMount100 – Universal meets car-specific

FlexMount is a mounting system based on specially developed adaptor rings, allowing the installation of COMPOSE FlexMount speakers in an almost infinite number of vehicles. Thus, the universal loudspeaker effortlessly becomes a vehicle-specific loudspeaker, that can be easily installed in the original installation position of the vehicle in an acoustically optimized way with the matching twist-lock FlexMount100 adaptor ring.

Find the right FlexMount for your car!

FlexConnect – One terminal for all cases

With our FlexConnect terminal, HELIX COMPOSE speakers can easily be connected directly to the original wiring harness of the vehicle, maintaining the automotive standard of the plug connection as well as guaranteeing reverse polarity protection. Similar to our FlexMount system, this technology relies on specially developed, vehicle-specific adaptors.



  • 4” / 100 mm performance midrange speaker which combines outstanding sound quality with versatile physical integration options
  • High efficiency and 3 Ohms technology for maximized power output of the amplifier
  • Unique Cenosphere coated paper cone for precise and detailed sound reproduction
  • High-tech polymer composite basket reinforced with glass beads for enormous rigidity and minimized ringing
  • Specially shaped rubber surround for high linear cone excursion
  • Polyurethane dustcap for optimized frequency response in the upper midrange area
  • 1” / 25 mm voice coil ensures high power handling
  • Automotive grade FlexConnect terminal for fast, secure and fail-safe connection
  • Shallow neodymium magnet system for low installation depth and high efficiency
  • Universal FlexMount100 mounting ring included in delivery
  • Designed for the optionally available car-specific FlexMount100 adaptors which allow an acoustically optimized and professional integration in the original mounting location of the vehicle

Technical data

Power handling RMS / max. P
80 / 120 Watts
Impedance  Z 3 Ω
DC resistance  Re 3.0 Ω
Frequency response   120 Hz - 6,000 Hz
Resonance frequency  Fs 146 Hz
Mechanical Q factor  Qms 4.49
Electrical Q factor  Qes 1.02
Total Q factor Qts 0.83
Compliance Cms 280 µm/N
Equivalent air volume Vas 1.1 L
Force factor  B*I 3.4 Tm
Sensitivity SPL 91 dB @ 2.83 V / 1m
87 dB @ 1W / 1m
Cone area  Sd 53 cm²
Moving mass  Mms 4.3 g
Cone material   Paper with Cenosphere coating
Mechanical resistance  Rms 0.87 kg/s
Voice coil diameter ø 25 mm
Voice coil winding height   4.8 mm
Max. linear excursion  Xmax +/- 2.0 mm
Outer diameter ø 98 mm / 3.86"
Outer diameter with universal mounting ring ø 104,5 mm / 4.11"
Installation diameter ø 89 mm / 3.50"
Installation depth   30 mm / 1.18"
Features   FlexConnect terminal,
powerful push-pull neodymium magnet system,


  • FlexMount100
  • FlexConnect Inlays

Scope of delivery

2 x Ci3 M100FM-S3
2 x Universal FlexMount100 (with standard 4-point mounting)
2 x FlexConnect inlay A
2 x Universal connection cable
2 x Mounting material

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