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 Sep 27 - Oct 2

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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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Elizabeth Madrid
Omaha, US
★★★★★ 5
Great product
Style: Standard, Size: 3 Count
Title: Good product, worth buying “I’m happy with this purchase. The product arrived on time and was easy to use. The quality is good for the price, and it works as expected. I’ve been using it for a few days and haven’t had any major issues. There are a couple of small things that could be improved, but overall it does the job well. I would recommend it to others looking for a reliable option.”
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Reviewed in the United States on May 24, 2026
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Verified Purchase
Anne L
Alexandria, US
★★★★★ 5
A must have for great tasting water
Style: Standard, Size: 6
These Brita filters are a staple in my house. They’re super easy to swap out and start working right away. The difference in water taste is noticeable—no more chlorine or odd aftertaste, just clean, fresh water. I love buying the multi-pack because it lasts for months and saves me from constantly reordering. Each filter holds up well and keeps the water consistently tasting great. It’s also a great alternative to bottled water, which saves money and cuts down on plastic use. Simple, reliable, and totally worth it!
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Reviewed in the United States on April 11, 2026
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Verified Purchase
Mac
Omaha, US
★★★★★ 5
Fast, quality filtration
Style: Standard, Size: 3 Count
Bought these for our Brita pitcher. Three in a pack is a good number for the price. They fit perfectly, as they should. No issues with leaking or clogging. We have pretty good water anyway but it's nice to run it through one more thing just to make sure. These work very quickly, especially compared to how I remember Britas working when I was a kid.
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Reviewed in the United States on May 1, 2026
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Verified Purchase
Gil Dyer
Draper, US
★★★★★ 5
The Simple Classic: Effective Filtration and Great Everyday Value
Style: Standard, Size: 2 Count
I've been using the Brita Everyday Pitcher for years, and it continues to be the best, most reliable solution for everyday filtered water. While there are more expensive pitchers out there, this model hits the sweet spot of affordability, capacity, and performance. Taste and Filtration The difference in taste is noticeable immediately. It does a fantastic job of removing the chlorine taste and odor from my tap water, making it much cleaner and more enjoyable to drink. It's excellent for making coffee, tea, and just hydrating throughout the day. I use the standard filters, which are easy to find and change out every couple of months. Design and Capacity The 10-cup capacity is perfect for a small family or an individual who drinks a lot of water. The rectangular design fits perfectly in the refrigerator door without taking up excessive space. It's a simple, no-frills design, which is exactly what I prefer—no electronic filter indicators, just reliable, clean water. Value For the price of the pitcher and the replacement filters, the Brita Standard is an unbeatable value. It’s a durable, no-nonsense product that delivers exactly what it promises: better-tasting water every day. If you're looking for an affordable, effective workhorse of a water filter pitcher, this is it.
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Reviewed in the United States on November 18, 2025
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Dennis
Massapequa, US
★★★★★ 4
Good Long Lasting Filters
Style: Standard, Size: 4 Count
I've been using Brita pitchers for years and these replacement filters continue to be one of the easiest and most affordable ways to improve the taste of regular tap water without installing a full filtration system. The biggest improvement is definitely the taste. After installing a fresh filter, the water tastes noticeably cleaner and smoother, getting rid of that strong chlorine smell or metallic aftertaste. These standard filters reduce chlorine taste and odor along with impurities like copper, cadmium, and mercury using activated carbon and ion-exchange resin technology. They're also BPA-free and designed to last up to 40 gallons or about two months per filter. The installation is simple and quick compared to older filter designs. I liked that these no longer require lengthy presoaking and the pull-top cap makes removal easier when it's time to swap filters. The 4 pack is also convenient because it lasts several months for an average household, making it more economical than constantly buying bottled water. My only complaint is that sometimes the water will run through very quickly and other times not so much which makes it harder to discern whether the filter is working effectively. Aside from tha, it seems like a simple and affordable everyday water filter.
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Reviewed in the United States on May 21, 2026

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