Ci3 T20FM-TI
  • CI21000
  • 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.

Stunning highs and outstanding stability

Our i3 tweeter is equipped with an innovative titan dome that combines outstanding stability with low moving mass and high inner damping as well as enormous thermal resistance – perfectly made for brilliant and compression-free treble reproduction.

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!


  • 0.75” / 20 mm performance tweeter with titanium dome for accurate and dynamic treble response
  • High efficient neodymium magnet for high magnetic flux linearity
  • 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

Technical data

Impedance   Z 4 Ω
DC resistance  Re  3.2 Ω
Frequency response    2,000 Hz - 25,000 Hz
Resonance frequency  Fs  1800 Hz
Sensitivity SPL  91 dB @ 2.83V / 1m
88 dB @ 1W / 1m
Voice coil diameter   Ø 20 mm
Cone material    Titanium
Outer diameter   32 mm / 1.26"
Installation diameter   28 mm / 1.10"
Installation depth   9.8 mm / 0.39" 
Recommended crossover frequencies for the highpass  
Slope    Minimum crossover frequency
6 dB/Octave  > 5,000 Hz
12 dB/Octave  > 3,500 Hz
24 dB/Octave   > 3,000 Hz


  • FlexMount20

Scope of delivery

2 x Ci3 T20FM-TI
2 x Tweeter flush mount
2 x Tweeter pod
2 x Extension cable
2 x Mounting material

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