• CI21001
  • DE 29323089

Press & awards






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.

i7 – High-end Car Audio made in Germany

Our HELIX COMPOSE i7 series represents uncompromising high-end for an outstanding sound experience in the automobile. With obvious influence of the high-end sister brand BRAX, the i7 speaker series is completely made in Germany and optimized for uncompromising music enjoyment. All speaker impedances are perfectly matched for the combination with our HELIX and MATCH amplifiers, guaranteeing maximum performance at any time. In addition, HELIX COMPOSE introduces four new mechanical technologies that offer unbeatable practical benefits.

Brilliant treble response

Our i7 tweeter is equipped with a fine-meshed silk dome with visco-elastic Acronal coating on both sides, guaranteeing a brilliant and smooth treble response. In addition, the integration of pure lamb’s wool and dampened coupling volume enables a very low resonance frequency and allows a deep acoustic coupling.

FlexMount20 – 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 tweeter effortlessly becomes a vehicle-specific tweeter, that can be easily installed in the original installation position of the vehicle in an acoustically optimized way with the matching FlexMount20 adaptor ring.

Find the right FlexMount for your car!



  • Super-wide dispersion 0.75” / 20 mm high-end silk dome tweeter with coupling volume for lowest possible resonance frequency
  • Exceptionally lightweight and fine-meshed silk dome ensures brilliant and smooth treble response
  • High efficient neodymium magnet for high magnetic flux linearity
  • Integrated, dampened coupling volume allows a low crossover frequency thanks to its low resonance frequency
  • Sturdy Aluminum housing turned from solid
  • Compact design and various mounting options for numerous installation demands
  • Mounting pods for flush mount and angle mount included in delivery
  • Designed for the optionally available car-specific FlexMount20 adaptors which allow an acoustically optimized and professional integration in the original mounting location of the vehicle
  • Made in Germany

Technical data

Impedance   Z 4 Ω
DC resistance  Re  3.4 Ω
Frequency response    1,500 Hz - 30,000 Hz
Resonance frequency  Fs  950 Hz
Sensitivity SPL  91.0 dB @ 2.83V / 1m
88.0 dB @ 1W / 1m
Voice coil diameter   Ø 20 mm
Cone material    Silk dome with coupling volume
Outer diameter   32 mm / 1.26"
Installation diameter   27.2 mm / 1.07"
Installation depth   19 mm / 0.75" 
Recommended crossover frequencies for the highpass  
Slope    Minimum crossover frequency
6 dB/Octave  > 4,000 Hz
12 dB/Octave  > 3,000 Hz
24 dB/Octave   > 2,500 Hz


  • FlexMount20

Scope of delivery

2 x Ci7 T20FM-SC
2 x Tweeter flush mount
2 x Tweeter pod
2 x Extension cable
2 x Mounting material

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