Helix Compose i7 Ci7 M100FM-S3 Midrange 4 Inch 10cm FlexMount Speakers 100w RMS
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The HELIX Ci7 M100FM-S3 is a 4-inch (10cm) midrange FlexMount speaker set from the flagship COMPOSE i7 series, rated at 100W RMS.
Developed Inside the Vehicle
COMPOSE is HELIX's answer to modern car design. Developed inside the vehicle, for the vehicle, it combines universal fitment with the precision of a vehicle-specific system.
3 Ohm Efficiency
Smart 3-ohm technology raises efficiency and maximum sound pressure. Impedances are matched to HELIX and MATCH amplifiers, so the pairing always delivers full performance.
Made in Germany
Built on know-how from HELIX's high-end sister brand BRAX, the i7 series is made entirely in Germany. UHD crossover technology is included as standard, tuned for accurate, uncompromising music reproduction.
Explore the full range in Helix Compose i7.
Specification
| Power handling | RMS / Max. P 100 / 150 Watts |
|---|---|
| Impedance | Z 3 Ω |
| Frequency response | 110 Hz - 7,000 Hz |
| Sensitivity | SPL 91 dB @ 2.83 V / 1m 87 dB @ 1W / 1m |
| Cone | area Sd 55 cm² |
| Cone | material Ultra high damping (UHD) crafted paper cone |
| Voice coil | diameter ø 25 mm |
| Voice coil | winding height 5.5 mm |
More specs
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What's Included
- 2 x Ci7 M100FM-S3
- 2 x Universal FlexMount100 (with standard 4-point mounting)
- 2 x FlexConnect inlay A
- 2 x Universal connection cable
- 2 x Crossover connection cable
- 2 x Mounting material
Helix
About the Helix CI21401
From our tech experts at CEN
Helix Compose i7 4 inch component speakers, with separate tweeters that can be mounted higher where you will actually hear them, rated at 100w RMS.
Who it suits
Drivers building a proper front stage. Helix is a brand people choose when they care about staging and detail rather than volume, and these reward an amplifier and a processor.
Our tech experts advise
Sizes, adapter rings and harnesses vary by vehicle, year and trim, so we confirm what your car takes before ordering rather than guessing. Door treatment and tweeter placement change the result as much as the speaker does. Installation and tuning are priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
Explore the full Helix range at CEN, with fast UK dispatch and expert advice from our Nottingham team. Shop all Helix
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Frequently Asked Questions
Q: Will these speakers fit my car?
A: Most car speakers are standard sizes, but mounting depth and fitting rings vary by vehicle. Check the size in the Specification tab against your vehicle, or contact CEN with your registration and we will confirm fitment and any adapters or fitting kits you need.
Q: Do I need an amplifier to run these speakers?
A: Not always. Most speakers will run from a standard head unit, but a dedicated amplifier lets them perform at their best, particularly for component sets and higher power handling models. The RMS figure in the Specification tab is the guide to how much clean power they can use.
Q: What is the difference between coaxial and component speakers?
A: Coaxial speakers combine the tweeter and woofer in one unit for a simple like-for-like upgrade. Component sets separate the tweeter and woofer with a crossover for better imaging and detail, and suit installs where sound quality is the priority.
Q: Do these come as a pair?
A: Unless stated otherwise, car speakers are sold in pairs. Check the product title and What's Included tab, which lists exactly what is in the box.
Q: Can CEN fit these speakers for me?
A: Yes. CEN offers professional installation from our Nottingham premises. Contact us to book an installation slot or ask for a fitting quote.
