Description
HELIX Ci7 6.5" 2-Way - High-End Component Speaker Set, FlexMount | 3Ω
6.5-inch high-end coaxial coincident speaker with 3 Ω impedance, silk dome tweeter with coupling volume and FlexMount technology
HELIX Ci7 C165.2FM-S3
Born out of the increasingly demanding challenges of modern automobile technology. The HELIX Ci7 C165.2FM-S3 - typical pursuit of intelligent solutions. Helix made the progressive redesign of proven universal speaker systems its mission. The result: an 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.
HELIX Ci7 C165.2FM-S3 – High-end Car Hifi made in Germany
The HELIX COMPOSE i7 series represents uncompromising high-end for an outstanding sound experience in the automobile. With clear influence from the high-end sister brand BRAX, HELIX manufactures the i7 speaker series entirely in Germany and optimises it for uncompromising musical enjoyment.
In addition, HELIX perfectly matches all speaker impedances to HELIX and MATCH amplifiers, guaranteeing maximum performance at all times. In addition, HELIX COMPOSE introduces four new mechanical technologies that offer unbeatable practical benefits.

High efficiency
HELIX COMPOSE equals smart engineering and accordingly implements highly efficient 3 Ohms technology, which perfectly harmonises with all HELIX and MATCH amplifiers while also delivering a clearly perceptible increase in efficiency and maximum sound pressure.
High-End Coaxial Coincident Speaker
The Helix Ci7 C165.2FM-S3 is a unique coaxial speaker that combines the best of the Ci7 W165FM-S3 High-End midbass driver and the Ci7 T20FM-SC high-end tweeter. Due to its complex design, the Ci7 C165.2FM-S3 is not just a simple coaxial speaker but a true coincident driver.
This advantage is that the sound from both drivers is produced at exactly the same time, turning the speaker into a point source. This results in extremely precise and time-coherent sound reproduction, which is particularly advantageous in acoustically challenging environments, making this speaker another smart, practical solution in the COMPOSE platform.
With the i7’s renowned UHD paper cone and the silk-dome tweeter, incl. the integrated coupling volume damped with pure lamb’s wool, the Helix C165.2FM-S3 delivers an exceptional combination of powerful, precise midbass and brilliant, smooth treble response.
The alignment of the drivers along the same sound axis ensures optimal phase coherence and a consistent sound image. This makes the Helix C165.2FM-S3 a versatile solution for audiophiles who want to experience a coherent soundstage from a single speaker position, while still benefiting from the intelligence and integration-friendly design of the COMPOSE platform.

High-tech polymer basket
All HELIX COMPOSE i7 and i3 speaker baskets are made of a high-tech polymer composite and additionally reinforced with glass spheres. The result: maximum stability with minimal self-resonance, eliminating flux modulation of the magnetic system and offering maximum resistance to thermal influences. Last but not least, this allows for much more compact basket dimensions. Thus enabling simplified installations in cramped conditions.
FlexMount165 – Universal meets car-specific
FlexMount is a mounting system based on specially developed adaptor rings. Allowing the installation of COMPOSE FlexMount speakers in an almost infinite number of vehicles. Thus, the universal loudspeaker effortlessly transforms into a vehicle-specific loudspeaker. Allowing you to easily install it in the vehicle’s original position with acoustically optimised performance using the matching FlexMount adaptor ring.
ProConnect – The new industry standard
Helix's innovative ProConnect midbass terminal is the new industry standard. A professional, automotive connector that provides a safe connection to our WireKits. It also allows the use of conventional speaker cables or car-specific adaptor cables via flat plugs. While giving maximum flexibility in the design of the sound system upgrade. Furthermore, the connection system interlocks securely, provides reverse-polarity protection, and withstands high levels of electrical and mechanical stress.
WireKits – Plug & Play at its best
Helix WireKits realise the connection of the COMPOSE coaxial speaker system to the original wiring harness. Manufactured to the high standards of the automotive industry. These arrestable adaptor cables meet all requirements for the harsh environmental conditions installers face in vehicles every day.
Scope of delivery
- 2 x Ci7 C165.2FM-S3
- 2 x Tweeter connection cable
- 2 x Midbass connection cable
- 1 x Mounting material
- 1 x Instruction manual










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