SKU: 53793034310

Helix Compose Ci3 K165.2FM-S3 MK2 - 6.5" 3 Ohm Component Set

Sale price$117.00 Regular price$130.00
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 12 - Jul 17

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Helix Compose Ci3 K165.2FM-S3 MK2 - 6.5" 3 Ohm Component SetHELIX Ci3 K165. 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 K165.2FM-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 component 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. Certain models will also be available as an optional 2 Ohm variants, assuring the absolute maximum performance and power of the respective speaker in combination with the appropriate amplifier.

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.

Perfectly separated

Our Ci3 FX-UNI.2 crossover is designed for the ideal use with our HELIX COMPOSE i3 components, and thus for the COMPOSE-typical, professional integration into the vehicle. It offers a 6-stage tweeter level adjustment with 12 dB slope for optimal adaptation to the installation position as well as an integrated tweeter protection. In addition, no effort was spared in the complex tuning of the crossover for the best possible distribution of the frequency band and a harmonious sound image. Thanks to its compact dimensions, the Ci3 FX-UNI.2 is perfectly suited for installation in tight spaces and is furthermore compatible with our COMPOSE Connect and WireKit technologies for a safe and fool-proof connection according to automotive standards.

COMPOSE Connect

Kiss tinkering and soldering goodbye. Compose Connect is the sophisticated plug-in connection that considerably simplifies car audio installation in conjunction with HELIX COMPOSE components. Proprietary plastic housings into which standard flat plugs and couplings can be snapped, establish an absolutely safe connection in accordance with automotive standards that prevents any polarity reversal.

FlexMount20 & 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.

WireKits – Plug & Play at its best

Our WireKits realize the connection of HELIX COMPOSE speaker kit 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 speaker kit which combines outstanding sound quality with versatile physical integration options
  • High efficiency and 3 Ohms technology for maximized power output of the amplifier
  • Smart, automotive grade connectors for fail-safe and secure installation – COMPOSE Connect & ProConnect
  • 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
    • Compact design and various mounting options for numerous installation demands
    • Mounting pods for flush mount and angle mount included in delivery
  • 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
    • Polyurethane dustcap for optimized frequency response in the upper midrange area
  • Crossover
    • Separate, high-grade crossover with compact dimensions for easy integration
    • 6-stage tweeter level adjustment with integrated tweeter protection for optimized treble adaptation to mounting position
    • Extensively fine-tuned – with 12 dB slope for tweeter
    • Designed for optionally available, car-specific WireKits which allow a non-destructive integration
  • Designed for the optionally available car-specific FlexMount165 & FlexMount20 adaptors which allow an acoustically optimized and professional integration in the original mounting locations of the vehicle

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

Tweeter: 32.0 mm / 1.26”
Midbass: 165.0 mm / 6.50”

Installation diameter ø

Tweeter: 32.0 mm / 1.26”
Midbass: 142.0 mm / 5.59”

Installation depth   

Tweeter: 9.8 mm / 0.39”
Midbass: 60.7 mm / 2.39”

Dimensions crossover  

103.3 x 50.4 x 25.0 mm /
4.07 x 1.98 x 0.98”

   
Midbass 
Impedance Z 3 Ω
DC resistance Re 3.0 Ω
Resonance frequency Fs 70 Hz
Mechanical Q factor Qms 4.17
Electrical Q factor Qes 1.05
Total Q factor Qts 0.84
Compliance Cms 454 μm/N
Equivalent air volume Vas 11.2 L
Force factor B*l 4.0 Tm
Cone area Sd 133 cm2
Moving mass Mms 11.3 g
Mechanical resistance Rms 1.18 kg/s
Voice coil diameter  ø 25 mm

Voice coil winding height

  10.5 mm
Max. linear excursion Xmax +/- 3.2 mm
   
Tweeter  
Impedance Z 4 Ω
Resonance frequency Fs 1800 Hz
Voice coil diameter ø 20 mm
   
Features  
Tweeter  

Ultra compact, aluminum dome, neodymium magnet and FlexMount20

Midbass  

Paper with Cenosphere coating, ProConnect terminal and FlexMount165

Crossover  

Tweeter: 12 dB highpass, protection and level adjustment
Midbass: 6 dB lowpass

Compatibility

  • FlexMount20
  • 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: 53793034310

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.7 ★★★★★
Based on 859 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
B
Verified Purchase
Brandonian
Los Angeles, US
★★★★★ 1
Flimsy Nozzle
Size: 2 fl oz
The nozzle is so flimsy at the moment I pressed on it it popped off the can into the gas tank. I didn’t press it softly but I also didn’t press it very hard either, getting it out was a huge pain in the butt.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
J
Verified Purchase
John
Battle Creek, US
★★★★★ 5
Good product
Color: Blue, Number of Items: 1
I like the product and it works as advertised
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
J
Verified Purchase
John H.
Lake Worth, US
★★★★★ 5
Keeps your engines running right.
Color: Blue, Number of Items: 1
Works great. I've had less trouble , mosty excellent performance with my small power tools and yard equipment since I've been using this and other Stay bil products.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 14, 2026
L
Verified Purchase
Len
Waukegan, US
★★★★★ 5
Easy Rider
Color: Blue, Number of Items: 1
Great product. Great price. Costs double at most retail stores. I use it for fuel in Bass Boat, Harley + all lawn cutting fuel for motors.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
G
Verified Purchase
Georgyo07
New York, US
★★★★★ 4
Helped to improve combustion in 12 year old Mercruiser 3.0L engine
Color: Blue, Number of Items: 1
I used the whole bottle in 1/2 tank of questionable gasoline from used boat from dealership, with no idea what mixture of gas water and particulates was in the gas tank in this 12 year old boat. The dealer started up the boat, and it was taking a minute to get the idle going. He mentioned that the gas was a few months old, but I am guessing that is was more like 6 months old. This is the TKS engine, self priming. I think some water / condensate was in the tank. Before taking out to first trip, I added bottle and 5 gallons fresh gas. That trip to the lake, I still has some issues getting it to start easily. Ran OK, not great that day, went home, changed cap and rotor and wires. Next trip, 1 week later, the 3.0L started great, ran great, I am not sure if it took some hours to fully mix and interact with the old gas, neutralize the water, and perform it's reactions, before it made existing gas more combustible, but that is what it seemed like to me. ***UPDATE**** - I had strange fuel issues the next season after using this product. I had to replace the fuel pump and many other fuel delivery components including the carburetor. Not sure if this contributed to the fuel system failing, the long term effects outweigh the short term gains.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 25, 2024

recommand products