Helix Compose Ci3 C165.2FM-S3 MK2- 6.5" 3 Ohm Coaxial Speakers
SKU: 78514199660

Helix Compose Ci3 C165.2FM-S3 MK2- 6.5" 3 Ohm Coaxial Speakers

Sale price$139.49 Regular price$154.99
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Ships within 48 hours · Estimated delivery Jul 6 - Jul 11

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Description

Helix Compose Ci3 C165.2FM-S3 MK2- 6.5" 3 Ohm Coaxial SpeakersHELIX Ci3 C165. 2FM S3 MK2 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

HELIX Ci3 C165.2FM-S3 MK2

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.

Performance highlight

The i3 coaxial systems give you everything you would expect from a great 2-way system: A first-class sound experience that, thanks to the use of high-quality materials and its particularly smart engineering, conveniently finds its way into the automobile. All components harmonize perfectly and form an ideal team with our HELIX and MATCH amplifiers, guaranteeing maximum performance and power output at all times. Furthermore, we implemented our new, mechanical technologies with a clear focus on safety during connection and operation for the purpose of creating ideal conditions for the integration into the vehicle with maximum compatibility.

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.

Natural brilliance and precise detail resolution

The 0.75” / 20 mm tweeter features an elegant black aluminum dome that strikes the perfect balance between low weight and high rigidity. Combined with the refined, highly efficient neodymium magnet system, it delivers an even more precise, clear, and detailed high-frequency response. The result is natural brilliance with outstanding resolution and impressive dynamics – for an exceptional listening experience.

FlexMount165 – 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 FlexMount adaptor ring.

ProConnect – The new industry standard

Our innovative ProConnect terminal is the new industry standard: A professional, automotive connector, allowing the safe use of conventional speaker cables, while also being ideally designed for connection via flat plug with our WireKits, offering maximum flexibility in the design of the sound system upgrade. Furthermore, the connection is interlocked, offers reverse polarity protection and is electrically and mechanically highly stressable.

WireKits – Plug & Play at its best

Our WireKits realize the connection of HELIX COMPOSE coaxial speaker system to the original wiring harness in the most comfortable way. With manufacturing according to the high standards of the automotive industry, these arrestable adaptor cables meet all requirements for the harsh environmental conditions that installers are facing in vehicles every day.

Features

  • 2-way performance coaxial speaker system which combines outstanding sound quality with versatile physical integration options
  • High efficiency and 3 Ohms technology for maximized power output of the amplifier
  • Automotive grade ProConnect connection terminal allows the use of conventional speaker cables or a fast, secure and fail-safe connection via optionally available WireKits
  • Tweeter
    • 0.75” / 20 mm performance tweeter with black aluminum dome for accurate, pure and detailed treble response
    • High-quality aluminum dome with perfect balance of low weight and high rigidity – for natural brilliance and fine detail reproduction
    • Refined highly efficient neodymium magnet for high magnetic flux linearity and optimized performance
  • Midbass
    • 6.5" / 165 mm midbass with 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
    • Powerful magnet system for high efficiency and optimum impulse response
  • Crossover
    • Integrated with 6 dB slope
  • Designed for the optionally available car-specific FlexMount165 adaptors which allow an acoustically optimized and professional integration in the original mounting location of the vehicle
  • Designed for optionally available, car-specific WireKits which allow a non-destructive integration

Technical data

Power handling RMS / Max.  P 100 / 150 Watts
Frequency response   60 Hz - 25,000 Hz
Impedance Z 3 Ω
Sensitivity  SPL 92 dB @ 2.83V / 1m
88 dB @ 1W / 1m
Outer diameter ø 165.0 mm / 6.50”
Installation diameter ø 142.0 mm / 5.59”
Installation depth    60.7 mm / 2.39”
   
Midbass
Impedance Z 3 Ω
DC resistance Re 3.1 Ω
Resonance frequency Fs 72 Hz
Mechanical Q factor Qms 4.02
Electrical Q factor Qes 1.04
Total Q factor Qts 0.82
Compliance Cms 466 μm/N
Equivalent air volume Vas 11.5 L
Force factor B*l 3.8 Tm
Cone area Sd 133 cm2
Moving mass Mms 10.4 g
Mechanical resistance Rms 1.17 kg/s
Voice coil diameter  ø 25 mm

Voice coil winding height

  10.5 mm
Max. linear excursion Xmax +/- 3.2 mm
   
Tweeter  
Voice coil diameter ø 20 mm
   
Features  
Tweeter   Aluminum dome and neodymium magnet
Midbass  

Paper with Cenosphere coating, ProConnect terminal
and FlexMount165

Crossover   Integrated, 6 dB highpass

Compatibility

  • FlexMount165
  • WireKits
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 78514199660

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April V.
Belleville, US
★★★★★ 3
Lots of accessories but kinda cheap looking
Color: Blue
I wanted something nicer so I returned.
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Reviewed in the United States on May 11, 2025
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Sharon Williams
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nice size
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very nice
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San Mac
Dallas, US
★★★★★ 5
Easy to use and decent enough quality
Style: Black, Style: Black
Easy to put together and the quality plastic is not the worse. Pretty thick and feels sturdy. All pieces came in their own clear plastic bag and none were missing. The bin size is good for a bathroom and you don’t have to use all the stuff it came with. The set gives a little luxurious feel/look.
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LFVa
Port Orchard, US
★★★★★ 5
Great value bath set
Style: Gray
This bath set is a great value. Yes, they are plastic but the gray color is nice and the metallic features add something. With coordinating shower curtain and towels, they look good. Has all the different pieces you would want. They are also very functional. The pieces easily assemble and the trash can lid and pump on the soap dispenser work well. (I've purchased much more expensive soap dispensers that didn't work well at all.) For the low price, this coordinated bath set is great.
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Grayson Childress
Battle Creek, US
★★★★★ 4
Cheap looking
Style: White
Kinda cheap but does the job.
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Reviewed in the United States on February 27, 2026

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