Helix Compose i5 Ci5 W165FM-S3 Midbass Woofer 6.5 Inch FlexMount 125w RMS

HELIX Ci5 W165FM-S3

HELIX COMPOSE. The perfect speaker for any composition. 

Born out of the increasingly demanding challenges of modern automobile technology and the HELIX-typical pursuit of intelligent solutions, we made the progressive redesign of proven universal speaker systems our mission. The result: our 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.

• 6.5” / 165 mm advanced midbass with exceptional sound performance and versatile physical integration options  
  
• High efficiency and 3 Ohms technology for maximized power output of the amplifier  
  
• Silicon coated paper cone for excellent impulse response and unmatched frequency response  
  
• Integrated phase plug for improved upper midrange reproduction, reduced compression effects, and increased thermal power handling of the voice coil 
  
• Engineered for maximum flexibility – delivers impressive depth and stunning dynamics in both 2-way and 3-way system configurations 
  
• High-tech polymer composite basket reinforced with glass beads for enormous rigidity and minimized ringing  
  
• Specially shaped rubber surround for high linear cone excursion  
  
• Large 1.46” / 37 mm voice coil ensures minimum thermal compression and high power handling  
  
• Automotive grade ProConnect connection terminal allows the use of conventional speaker cables or a fast, secure and fail-safe connection via optionally available WireKits  
  
• Powerful magnet system for highest efficiency and extremely low distortion 
  
• Designed for the optionally available car-specific FlexMount165 adaptors which allow an acoustically optimized and professional integration in the original mounting location of the vehicle  
  
• Designed for optionally available, car-specific WireKits which allow a non-destructive integration 
  

The Sound Sensation for sophisticated music lovers 

The HELIX COMPOSE i5 series is the link between i7 and i3, created for sophisticated music lovers with a sparked ambition for a true hi-fi experience. A lovechild of phenomenal sound and unmatched practicality: Developed with the vision of unique speaker highlights that are also true problem solvers. All speaker impedances are perfectly matched for the combination with our HELIX and MATCH amplifiers, guaranteeing maximum performance at any time. In addition, we implemented our COMPOSE-exclusive mechanical technologies that offer unbeatable practical benefits. 

High efficiency

HELIX COMPOSE equals smart engineering and accordingly implements highly efficient 3 Ohm technology, that perfectly harmonizes with all HELIX and MATCH amplifiers and at the same time allows a clearly perceptible plus in efficiency and maximum sound pressure.

Versatility at its finest

The Ci5 W165FM-S3 midbass is a true all-rounder within the COMPOSE platform. With its finely tuned acoustic design, it effortlessly adapts to both classic two-way setups and more complex three-way configurations. A key element of this versatility is the precisely engineered phase plug, which not only reduces mechanical compression and supports more even sound dispersion, but also significantly enhances the impulse response in the upper midrange. Matched in color to the dome of the Ci5 T25FM-CA tweeter, it creates a visually cohesive pairing – ideal for systems where sonic excellence and aesthetic harmony go hand in hand. The lightweight yet exceptionally rigid paper cone features a premium silicon coating that delivers excellent damping and structural stability, effectively suppressing unwanted resonances. The result is a loudspeaker that excels in every discipline – with precision, dynamics, and a clear focus on musical expression. 

High-tech polymer basket

All HELIX COMPOSE i7 and i3 speaker baskets are made of a high-tech polymer composite, which has been additionally reinforced with glass spheres. The result: maximum stability with minimal self-resonance, while also eliminating flux modulation of the magnetic system and maximum resistance to thermal influences. Last but not least, this allows for much more compact basket dimensions and thus simplified installations in cramped installation 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 becomes a vehicle-specific loudspeaker, that can be easily installed in the original installation position of the vehicle in an acoustically optimized way with the matching FlexMount adaptor ring.