SKU: 33547261482

Helix Compose CB C87.2-S3 - 87mm Coaxial Speakers

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Description

Helix Compose CB C87.2-S3 - 87mm Coaxial SpeakersHELIX CB C87. 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 CB C87.2-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.

The essentials for an exceptional sound experience 

You might have already guessed from the name: our BASIC component systems are the perfect introduction to the world of HELIX COMPOSE, providing all the essentials for an exceptional sound experience in your vehicle. All components harmonize perfectly and form an ideal team with our HELIX and MATCH amplifiers, guaranteeing maximum performance and power output at all times.

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.

Powerful bass – always on point

In the BASIC series, our COMPOSE midbass driver combines high efficiency with excellent sound quality. The lightweight but stable polypropylene diaphragm provides exceptional sound performance while the sturdy basket is equipped with additional ventilation holes for optimized cooling. A powerful magnet system provides ideal impulse response and the soft polyurethane dustcap guarantees optimized frequency response in the upper midrange. Last but not least, the compact design is ideally suited for integrations in cramped spaces.

High frequency reproduction with unique dynamics

Of course, when entering the sound world of HELIX COMPOSE, precise highs are a must for an all-around exciting music experience. Accordingly, the tweeter uses a leightweight PEI dome as well as a highly efficient neodymium magnet – the result: unique dynamics in the high-frequency reproduction and crystal-clear sound.

Features

  • 2-way coaxial speaker system which combines high efficiency with exceptional sound performance
  • 3 Ohms technology for maximized power output of the amplifier
  • Compact design for trouble-free installation even in cramped conditions
  • Tweeter
    • 0.5” / 13 mm tweeter with PEI dome for accurate treble response
    • Very efficient neodymium magnet for high magnetic flux linearity
  • Midrange
    • 3.4” / 87 mm midrange with lightweight polypropylene cone which provides essential stiffness for exceptional sound performance
    • Sturdy steel basket with additional ventilation holes for better voice coil cooling and high power handling
    • Powerful magnet system for optimized impulse response
  • Crossover
    • Integrated with 6 dB slope

Technical data

Power handling RMS / Max.  P 40 / 60 Watts
Frequency response   110 Hz - 22,000 Hz
Impedance Z 3 Ω
Sensitivity  SPL 88 dB @ 2.83V / 1m
84 dB @ 1W / 1m
Outer diameter ø 86.9 mm / 3.43”
Installation diameter ø 79.0 mm / 3.11”
Installation depth    42.0 mm / 1.65”
   
Midrange  
Impedance Z 3 Ω
DC resistance Re 3.0 Ω
Resonance frequency Fs 92 Hz
Mechanical Q factor Qms 3.80
Electrical Q factor Qes 0.74
Total Q factor Qts 0.62
Compliance Cms 820 μm/N
Equivalent air volume Vas 1.5 L
Force factor B*l 2.9 Tm
Cone area Sd 36 cm2
Moving mass Mms 3.6 g
Mechanical resistance Rms 0.52 kg/s
Voice coil diameter  ø 25 mm

Voice coil winding height

  8.3 mm
Max. linear excursion Xmax +/- 2.2 mm
   
Tweeter  
Voice coil diameter ø 13 mm
   
Features  
Tweeter   PEI dome and neodymium magnet
Midbass  

Injected polypropylene cone

Crossover   Integrated, 6 dB highpass
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: 33547261482

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Verified Purchase
Ryan
Lowell, US
★★★★★ 5
The BEST braw ever!
Size: 36D, Color: Nude
This braw was the best braw I’ve ever had in my life! I’ll definitely buy more!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
D
Discerning
Alexandria, US
★★★★★ 5
This one is a keeper…
Size: 36D, Color: Nude
Bra shopping is truly one of my least favorite things to do, and it is always so frustrating to me. Online bra shopping tends to be even worse, so I had little hope for this bra but took a chance anyway. I was pleasantly surprised by how much I liked it! A true test for me is whether or not I notice I’m wearing it. I’ve worn it off and on for several days and I totally forget about it. Having nurses two babies and approaching my 40s, my girls need a lot of support and this bra delivered. I thankfully discovered years ago that if you have deflated mom boobs, an unlined cup is the best way to take what you have and give it shape. This one does just that. I have very mixed feelings on the lace though. On the one hand, it is sexy and feminine and I don’t find that in bras very much anymore (at least not ones that provide the kind of lift and support that I require). However, the lace is very noticeable through a shirt. I really can only wear this bra with a thick top or sweater. Otherwise, it’s just too noticeable and I’m not comfortable with that. Wearing a cami underneath a top helps slightly though. Overall, I’m glad I have this bra and I’ll be ordering another color. It feels well made, the material is nice, and it gives my bust a shapely (and youthful 😭) appearance. I wore it all day in 90+ heat at Magic Kingdom and it didn’t bother me at all, so it definitely qualifies as lightweight and comfortable in my book. I took a stab at a size and the 36D feels right. I *maybe* could have gotten a 34 but the 36 doesn’t feel loose on the tightest loops. On occasion, depending on the brand, I can be either a D or DD. I think this is worth trying and looks more expensive than it really is!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 12, 2026
K
Kate
Birmingham, US
★★★★★ 5
Gorgeous Bra, But My Chest Declined the Opportunity
Size: 40C, Color: Black, Size: 40C, Color: Black
This bra is genuinely beautiful and very well made. The fabric, stitching, and overall construction felt much more expensive than I expected. Unfortunately, my body once again reminded me that I am apparently not built according to standard human engineering specs. Every few years I convince myself, “Surely this time I am a normal-sized woman who can wear regular bras.” Then I order one designed for actual flesh-bearing individuals and reality humbles me immediately. The cups stood there optimistically waiting to be filled while my chest contributed little to the project. The straps also kept sliding off my narrow shoulders like they were trying to escape the situation entirely. None of this is the bra’s fault. The fabric is soft, silky, and looks like money. It's just as pretty as the photos. The straps appear as though they could support a lot for a long time. The bra did its job. My body simply refused to participate. If you have average proportions and shoulders that can support standard straps, this is probably a fantastic purchase. I, however, must return to my specialized tiny-person undergarments and accept my fate.
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Reviewed in the United States on May 22, 2026
C
Verified Purchase
cisekm
Fort Morgan, US
★★★★★ 3
I really like this bra, but...
The bra fir great and I wish I could keep it. The big downfall is the lace and the middle seam. Both show thruogh any shirt material so you can't ear it under anything without the bra showing through as bumpy. I'm returing it for that reason along.
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Reviewed in the United States on May 15, 2026
J
Verified Purchase
Jenn NYC
Birmingham, US
★★★★★ 5
Beautiful and best cross chest/ waist bag!
Size: M, Color: Brown
Beautiful vegan leather in brown, with a beautifully embroidered adjustable strap.. Comfortable , size Medium is rperfect! Roomy and has an inside zippered pocket. Perfect cross chest bag, for Mom's who are a toting a toddler and other stuff
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Reviewed in the United States on January 14, 2026

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