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HELIX COMPOSE i5 W165FM-S3

  • Writer: Chris Van Ry
    Chris Van Ry
  • Aug 13
  • 2 min read

Midbass That Matters

The new HELIX COMPOSE i5 W165FM-S3 isn’t just another 6.5" midbass driver; it’s a carefully engineered bridge between precision mechanical design and pure, musical sound reproduction. With availability scheduled for the end of August 2025, it’s set to become a go-to choice for technicians and enthusiasts who demand both performance and premium integration.


HELIX COMPOSE i5 W165FM-S3

The Midbass: The Heartbeat of Your System

In a well-designed car audio system, the midbass driver is the link between the subwoofer’s low-end power and the midrange’s detail. If that connection is weak, your system can sound hollow, lack punch, or feel disconnected.


The i5 W165FM-S3 addresses this with:

  • A silicon-coated paper cone - Paper cones remain a gold standard in speaker design for their natural tonal balance. HELIX takes it further by adding a silicon coating for improved internal damping and stability, reducing unwanted resonances.

  • 3 Ω impedance - This slightly lower impedance allows your amplifier to deliver more power, extracting maximum performance without compromising amplifier compatibility.

  • Integrated phase plug - Not just cosmetic, this improves upper-midrange dispersion, reduces compression effects, and allows for better heat dissipation from the voice coil.

  • Glass-bead reinforced polymer basket - Rigid, non-resonant, and durable. This minimizes mechanical coloration while ensuring the speaker stays stable under dynamic loads.

  • High sensitivity (92 dB) - Meaning less amplifier power is needed to reach the same loudness, giving you more headroom and cleaner dynamics.


Installation Flexibility Built-In

Audiotec Fischer designed the COMPOSE line from the installer’s perspective. The FlexMount165 adaptor system and ProConnect terminals make it easier to fit into a variety of vehicles without hacking factory parts. Optional WireKits allow for plug-and-play connections, making the i5 W165FM-S3 equally suited for OEM integration or full aftermarket systems.

HELIX COMPOSE i5 W165FM-S3

Power & Performance Specs at a Glance

  • Power Handling: 125 W RMS / 175 W Max

  • Frequency Response: Wide range for a midbass, ensuring seamless crossover integration

  • Sensitivity: 92 dB (2.83 V / 1 m)

  • Impedance: 3 Ω

These numbers translate into a driver that can handle serious volume without breaking up, yet still delivers micro-detail and transient accuracy for high-end sound quality builds.


Who Will Love the i5 W165FM-S3?

  • SQ Enthusiasts - Clean, articulate, and dynamically responsive midbass.

  • OEM+ Installers - Flexible mounting and connection options reduce labor and preserve factory integrity.

  • Pro Audio Builders - Robust mechanical design means predictable performance under competition or high-demand conditions.


Available Soon

The HELIX COMPOSE i5 W165FM-S3 will be available at the end of August 2025. Whether you’re upgrading a daily driver or crafting a reference-level competition system, these drivers are ready to anchor your system with precision and punch.


MSC is your North American source for HELIX products - www.msc-america.com

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