SKU: 71894160052

Helix Compose Ci3 C130.2-S3 - 5.25" 3 Ohm Coaxial Speakers

Sale price$139.49 Regular price$154.99
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Ships within 48 hours · Estimated delivery Sep 29 - Oct 4

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Description

Helix Compose Ci3 C130.2-S3 - 5.25" 3 Ohm Coaxial SpeakersHELIX Ci3 C130. 2 S3 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

HELIX Ci3 C130.2-S3

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.

Stunning Highs and outstanding stability

The 0.75” / 20 mm tweeter is equipped with an innovative titanium 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.

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 high efficiency with outstanding sound quality
  • 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 tweeter with titanium dome for accurate and dynamic treble response
    • Highly efficient neodymium magnet for high magnetic flux linearity
  • Midbass
    • 5.25" / 130 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 optionally available, car-specific WireKits which allow a non-destructive integration

Technical data

Power handling RMS / Max.  P 90 / 135 Watts
Frequency response   80 Hz - 25,000 Hz
Impedance Z 3 Ω
Sensitivity  SPL 92 dB @ 2.83V / 1m
88 dB @ 1W / 1m
Outer diameter ø 130.0 mm / 5.12”
Installation diameter ø 116.5 mm / 4.59”
Installation depth    55.4 mm / 2.18”
   
Midbass  
Impedance Z 3 Ω
DC resistance Re 3.0 Ω
Resonance frequency Fs 92 Hz
Mechanical Q factor Qms 2.76
Electrical Q factor Qes 0.90
Total Q factor Qts 0.68
Compliance Cms 374 μm/N
Equivalent air volume Vas 4.9 L
Force factor B*l 3.8 Tm
Cone area Sd 97 cm2
Moving mass Mms 7.6 g
Mechanical resistance Rms 1.60 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   Titanium dome and neodymium magnet
Midbass  

Paper with Cenosphere coating and ProConnect terminal

Crossover   Integrated, 6 dB highpass

Compatibility

  • 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: 71894160052

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4.2 ★★★★★
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Verified Purchase
Correll Associates
Charlottesville, US
★★★★★ 3
Great sheets, wrong size
Color: 01 - Ivory, Size: King
I love the quality of these sheets, but we ordered a King set and were sent a Queen set. These were returned and another set sent to us. Same thing. Queen again. I would love to have a set of these sheets, but I'm not sure how to actually get a King set. Are these being packaged incorrectly by the manufacturer and then mislabeled? Has anyone else had this issue?
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Reviewed in the United States on March 8, 2026
S
Verified Purchase
Shannon C.
Bozeman, US
★★★★★ 5
High-quality, soft, cooling and stay in place
Color: Beige, Size: King
I am highly impressed and I highly recommend. These sheets are so soft and made of high-quality material. They are not thin but yet they are so cooling and comfortable. You can just tell that they are made of good quality material. Truly feels like a luxury sheet. Most importantly, the fitted sheet truly stays on the mattress, which is something I was struggling with. They’re deep pockets and they stay in place. They look beautiful. they feel beautiful and I highly recommend. They do get a little wrinkled if you leave them in the dryer, but overall, I would buy again and recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 4, 2026
J
Verified Purchase
Jessica
Bozeman, US
★★★★★ 5
Holy Grail
Color: White, Size: King
Holy Moly!!!! Ummm where do I begin?? Let’s start with how soft and delicious these sheets are right out of the package. I literally had 2 day old sheets on my bed and I couldn’t wait to wash these sheets and put them on my bed. I’m normally a percale sheet lover but even 2 years in, they are too stiff for me. I have other Bedsure products so I decided to buy these bamboo sheets and I’m so happy I did. The quality is unmatched, they are cooling, soft and very very comfortable to sleep on. They fit my mattress amazingly, even with a mattress topper and protector on it. They do take a long time to dry on low, per the instructions, but chat GPT assured me that it’s actually a good thing because the materials are high quality when they take awhile to dry on low. The last 10 mins, I did bump the heat up to medium and watched closely and took them out immediately and there were zero wrinkles. Chat GPT also said no fabric softeners or dryer sheets to preserve the fabric with no pilling and to keep the cooling effect that the bamboo offers so keep that in mind. I’m obsessed with every single product this company makes and these sheets are no different!!! The price is amazing for the quality too!!
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Reviewed in the United States on January 4, 2026
B
Verified Purchase
Bmoreos1
Louisville, US
★★★★★ 5
Best sheets
Color: White, Size: Queen
I have bought, like many, at least 2 sheet sets per year, either because of substandard quality or by not meeting "Cooling" promises. I learned along time ago that "You get what you pay for" especially with sheets. All the Ross, Marshalls and Burlington sets that look to be great deals because they have to be,? they're at discounters and sure to be half of what they normally sell for, right?? I took a chance when I noticed these for $139 (Queen, 1 year ago). I had a set of the Maloufs Rayon from Bamboo queen sheets that I adored, $159, but after just a dozen or so washings they literally got holes in them. I trim my toe nails so that I don't punture the sheets, had to learn that the hard way. Malouf said that my top loading wash machine was adding to the issue!!! I don't walk around with any holes in my wardrobe and I wash everything in the same unit. Any way, I took that chance and these are the BEST sheets I have ever purchased, period. I ended up with a hole in one set and Bedsure provided me a hefty discount/refund on my next set. These are very smooth so if you are sensitive to the feel of certain materials, you will be very happy. They don't have that cheap Microfiber Sheen that you get with other sets in this price range. They keep me very cool, and I'm a true hot body. Buy these and I assure you that, for the money, I don't believe there exists anything better... Enjoy
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Reviewed in the United States on January 16, 2026
E
Verified Purchase
Excellent, sturdy baskets! Work very well in the shower. Definitely helped with organization!
Lowell, US
★★★★★ 5
Good quality sheets
Color: White, Size: King
Really lovely sheets! Just the right thickness, not scratchy and fit our deep mattress. Have washed these a few times now and they get softer. No pilling thus far. Great buy!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026

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