Helix Compose i5 BMW Mini Underseat Woofers 8 Inch FlexMount Subwoofers 200w
Couldn't Load Pickup availability
The HELIX COMPOSE i5 are 8-inch underseat subwoofers built for BMW and Mini, fitting the factory underseat positions using FlexMount200 adapters and handling 200 W RMS (400 W max). They are for BMW and Mini owners who want deeper bass from the original underseat speaker locations.
Key specifications
- Size: 8-inch (195 mm outer diameter)
- Power handling: 200 W RMS / 400 W max
- Frequency response: 25 Hz - 500 Hz
- Sensitivity: 92 dB @ 2.83 V / 1 m (86 dB @ 1 W / 1 m)
- Installation depth: 47 mm
- Installation diameter: 173.5 mm
- Mounting: FlexMount200 car-specific adapters
- Cone: Injected polypropylene
HELIX COMPOSE i5 overview
The HELIX COMPOSE i5 are 8-inch underseat subwoofers built specifically for BMW and Mini, fitting directly into the factory underseat positions and handling 200W.
Developed inside the vehicle
COMPOSE is HELIX's answer to modern car design. Developed "inside the vehicle, for the vehicle", it blends universal speakers with the advantages of vehicle-specific systems.
2 ohm single voice coil
Each Ci5 S200FM-S2 woofer has a single 2 ohm voice coil (1 x 2 ohms) for maximum power output from the amplifier.
FlexMount fitting
The i5 series uses HELIX's FlexMount system, simplifying installation across a wide range of vehicles and factory speaker positions.
Explore the full range in Helix Compose i5.
Specification
| Power handling | RMS / Max. P |
|---|---|
| Impedance | Z 1 x 2 Ω |
| Frequency response | 25 Hz - 500 Hz |
| Sensitivity | SPL 92 dB @ 2.83 V / 1m 86 dB @ 1W / 1m |
| Cone | area Sd 194 cm² |
| Cone | material Injected polypropylene |
| Voice coil | diameter ø 38 mm |
| Voice coil | winding height 20.6 mm |
More specs
| |
What's Included
- 2 x Ci5 S200FM-S2
- 2 x Mounting material
- CFMK200 BMW.1S
Helix
About the Helix CI21804 - CI42216
From our tech experts at CEN
This bundle pairs the HELIX Compose i5 Ci5 S200FM-S2 8 inch hybrid subwoofers with the CFMK200 BMW.1S FlexMount200 adaptor rings, so they drop straight into the factory underseat subwoofer positions in BMW and MINI models. Each woofer handles 200W RMS (400W max), with a single 2 ohm voice coil and just 47mm installation depth.
Who it suits
BMW and MINI owners whose factory underseat woofers leave the low end thin. Buying the woofer and vehicle-specific adaptor together means the fit and connector are sorted, and the rings work with the original grilles. The woofer is also sold on its own as the Ci5 S200FM-S2.
Our tech experts advise
These are 2 ohm drivers covering 25Hz to 500Hz, so they want an amplifier channel that is happy at that load rather than the factory head unit. The adaptor's moulded terminal plugs into the original harness, but tuning matters as much as the hardware. Tell us your model and year and we will confirm the fit. 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
Recommended For You
Discover more top-rated gear, handpicked to go with what you're viewing
Helix News & Guides
The latest Helix product news, launches and guides from the CEN team in Nottingham.
What Is a DSP? In-Car Sound Processing Explained
A DSP (digital sound processor) is the component that makes a good car system sound like a great one: it...
New at CEN: Helix Next DSP Ultra XT — The New Flagship of In-Car Processing
The Helix Next DSP Ultra XT has arrived: a 16-channel standalone processor that now sits at the very top of...
Helix Ci5 Compact Speakers with Audiophile Sound
Intelligent, Compact Construction M50FM-S3 & M80FM-S3 The M50FM-S3 and M80FM-S3 boast an intelligent, compact construction that allows for seamless integration...
Looking for Installation?
At CEN we take pride in being able to share the quality of our work as well as being able to show what incredible products we have installed week on week.
Audiotec Fischer Brands
High-End Car Hifi components from Audiotec Fischer
More from Helix Compose i5
More options from the same range, in stock and ready to go
Best SellerHelix Compose i5 Ci5 M80FM-S3 Midrange Speakers 3 Inch 80 mm FlexMount 90w RMS
£149.99
View product
Helix Compose i5 Ci5 M80FM-D3 CTR Center Speaker 3 Inch 90w
£119.99
Helix Compose i5 Ci5 S200FM-S2 Woofer 8 Inch FlexMount Hybrid Subwoofer 200w RMS
£254.99
Helix Compose i5 Ci5 S200FM-D2 Woofer 8 Inch FlexMount Hybrid Subwoofer 200w RMS
RRP £299.99Save 15%£254.99
Best SellerHelix Compose i5 Ci5 T25FM-CA Tweeters 1 Inch 25mm FlexMount Aluminum Dome
RRP £149.99Save 16%£124.99
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.
Q: Will the HELIX COMPOSE i5 fit my BMW or Mini?
A: They are built for the factory underseat positions in BMW and Mini models, using FlexMount200 car-specific adapters. The box includes the CFMK200 BMW.1S mounting kit. Contact CEN with your vehicle details to confirm fitment.
Q: How deep are the HELIX COMPOSE i5 woofers?
A: They need only 47 mm installation depth, with a 173.5 mm installation diameter and 195 mm outer diameter, so they suit restricted underseat spaces.
Q: What power can the HELIX COMPOSE i5 handle?
A: Each woofer handles 200 W RMS and 400 W max, covering 25 Hz to 500 Hz. HELIX matches the impedance to HELIX and MATCH amplifiers.
