BMW premium speaker system | HELIX Ci7100 | Helix Ci7T20

The premium 2-way replacement speaker system for BMW consists of the high-end 100mm Helix Compose Ci7M100FM-S3 mid-bass driver, combined with the Helix Compose Ci7T20 tweeter, a custom crossover, vehicle-specific adapters, and a plug-and-play connection adapter.

The system is based on the HELIX COMPOSE Ci7 speaker series. This series represents uncompromising high-end sound and an extravagant in-car audio experience. With significant influence from its high-end sister brand Brax, the Ci7 speaker series is entirely "made in Germany" and stands for pure, unadulterated musical enjoyment.

Features

• 2-way high-performance speaker kit, which combines unique sound characteristics with versatile integration options
• High efficiency and 3-ohm technology for maximized amplifier power output
• Ingenious automotive-grade connectors for a secure, non-reverse polarity connection – COMPOSE Connect & FlexConnect

Tweeter

• Helix Ci7T20, extremely wide-dispersion 20 mm high-end silk dome tweeter
• Coupling volume for low resonance frequency and reduced distortion
• Outer ring neodymium magnet
• Precisely coated textile diaphragm
• Optimized dome shape for wide frequency range
• Ventilated voice coil former for reduced distortion and compression
• Supplied with mounting adapter CFMK20 BMW.1

Midrange

• HELIX Ci7 M100 mm high-end midrange driver, which combines unique sound characteristics with the most versatile integration options

• High efficiency and 3 Ohm technology for maximized amplifier power output
• UHD (Ultra High Damping) Paper diaphragm for excellent impulse response and unsurpassed frequency response
• Glass bead reinforced high-tech polymer composite basket for maximum rigidity and lowest resonances
• Specially shaped rubber surround for large linear diaphragm excursion
• Polyurethane dome (dustcap) for optimizing the frequency response in the upper midrange
• 25 mm voice coil for minimal thermal compression and high power handling
• Powerful push-pull neodymium magnet system for particularly high efficiency and minimal distortion
• Adapted mounting adapter with cable adapter for BMWs from approx. 2015 onwards

Crossover

• High-quality, separate crossover with compact dimensions for easy installation
• Extensively tuned – with a 12 dB slope for the Tweeter
• retrofittable connection to the original vehicle wiring harness