Helix Ci7 M100FM-S3 Installer-Package – 100 mm high-end midrange in 3 Ω technology
The Ci7 M100FM-S3 is the 4″ midrange of the HELIX COMPOSE i7 series, the high-end line of the COMPOSE platform, which combines universal speakers with the advantages of vehicle-specific installation. It is made in Germany and intended for demanding front systems where a dedicated midrange covers the vocal range.
Installer Package – Scope of Delivery
This multi-unit installer package is aimed at professional installers and workshops who fit the same model in several vehicles. The package contains:
- 8 x High-end midrange HELIX Ci7 M100FM-S3
- 8 x Universal FlexMount100 (with standard 4-point mounting)
Its 3 Ω design is matched to HELIX and MATCH amplifiers to extract more power and sound pressure. A handmade UHD (Ultra High Damping) paper cone improves frequency and impulse response, while the glass-sphere-reinforced polymer basket adds rigidity, reduces self-resonance and keeps the chassis compact. The FlexMount100 ring system and the FlexConnect terminal with reverse-polarity protection enable fitting in original positions and direct connection to the factory harness.
Key Features
- 3 Ω technology: higher efficiency and more output from the amplifier.
- UHD paper cone: handcrafted Ultra High Damping paper for clean impulse and frequency response.
- Reinforced polymer basket: glass-bead-filled composite for stiffness and minimal ringing.
- Rubber surround: specially shaped for high linear excursion.
- Polyurethane dustcap: optimised for the upper midrange.
- 25 mm voice coil: low thermal compression and high power handling.
- Push-pull neodymium magnet: high efficiency and low distortion.
- FlexConnect terminal: automotive-grade, fast and fail-safe connection with reverse-polarity protection.
- Universal FlexMount100 ring: standard 4-point mounting ring as part of the concept.
- Car-specific adaptors: compatible with vehicle-specific FlexMount100 adaptors.
- Made in Germany.
Drivers & Construction
100 mm driver with UHD crafted paper cone (55 cm² cone area), rubber surround, polyurethane dustcap, 25 mm voice coil with 5.5 mm winding height and a push-pull neodymium motor in a glass-bead-reinforced polymer basket.
Acoustic Performance
Power handling 100 W RMS / 150 W max, impedance 3 Ω (Re 3.0 Ω), frequency response 110–7,000 Hz, sensitivity 91 dB at 2.83 V/1 m (87 dB at 1 W/1 m). Thiele-Small data: Fs 85 Hz, Qms 4.58, Qes 0.52, Qts 0.47, Cms 590 µm/N, Vas 2.5 l, BL 4.3 Tm, Mms 5.9 g, Rms 0.69 kg/s, Xmax ±1.3 mm.
Installation Notes
Outer diameter 98 mm (3.86″), 104.5 mm (4.11″) with the universal mounting ring; installation diameter 89 mm (3.50″), installation depth only 26.9 mm (1.06″). Vehicle-specific FlexMount100 adaptors allow fitting in factory locations.
Technical Specifications
| Power handling RMS / Max. | P |
100 / 150 Watts |
| Impedance | Z | 3 Ω |
| DC resistance | Re | 3.0 Ω |
| Frequency response | 110 Hz – 7,000 Hz | |
| Resonance frequency | Fs | 85 Hz |
| Mechanical Q factor | Qms | 4.58 |
| Electrical Q factor | Qes | 0.52 |
| Total Q factor | Qts | 0.47 |
| Compliance | Cms | 590 µm/N |
| Equivalent air volume | Vas | 2.5 L |
| Force factor | B*I | 4.3 Tm |
| Sensitivity | SPL | 91 dB @ 2.83 V / 1m 87 dB @ 1W / 1m |
| Cone area | Sd | 55 cm² |
| Moving mass | Mms | 5.9 g |
| Cone material | Ultra high damping (UHD) crafted paper cone | |
| Mechanical resistance | Rms | 0.69 kg/s |
| Voice coil diameter | ø | 25 mm |
| Voice coil winding height | 5.5 mm | |
| Max. linear excursion | Xmax | +/- 1.3 mm |
| Outer diameter | ø | 98 mm / 3.86″ |
| Outer diameter with universal mounting ring | ø | 104.5 mm / 4.11″ |
| Installation diameter | ø | 89 mm / 3.50″ |
| Installation depth | 26.9 mm / 1.06″ | |
| Features | FlexConnect terminal, powerful push-pull neodymium magnet system, FlexMount100 |
Scope of Delivery
8 x High-end midrange Ci7 M100FM-S3
8 x Universal FlexMount100 (with standard 4-point mounting)
