HELIX COMPOSE Ci3 W165-S2 – 6.5″ 2 Ohm Performance Midbass Car Speakers (150W Max)

HELIX COMPOSE Ci3 W165-S2 – High-Efficiency 2 Ohm Midbass Speakers for Powerful OEM & DSP Upgrades

The HELIX COMPOSE Ci3 W165-S2 is a premium 6.5-inch (165 mm) performance midbass speaker designed for drivers seeking maximum efficiency, powerful bass and exceptional sound quality. Featuring an advanced 2 Ohm impedance, an innovative Cenosphere-coated paper cone, 100W RMS, 150W peak power, and a wide 60 Hz – 3,500 Hz frequency response, the Ci3 W165-S2 delivers outstanding dynamics and impressive midbass performance from both factory and aftermarket amplifiers.

Developed as part of the innovative HELIX COMPOSE platform, this speaker combines universal compatibility with vehicle-specific installation options, making it ideal for OEM upgrades, DSP systems and premium car audio installations.

High-Efficiency 2 Ohm Technology

Unlike conventional 4 Ohm speakers, the 2 Ohm voice coil allows compatible amplifiers to deliver significantly more power.

Benefits include:

• Higher overall output
• Stronger bass performance
• Improved amplifier efficiency
• Greater dynamic range
• Excellent compatibility with HELIX and MATCH amplifiers

With 94 dB sensitivity (2.83V / 1m), the Ci3 W165-S2 produces impressive sound pressure while maintaining excellent clarity.

Cenosphere-Coated Paper Cone

HELIX utilizes an advanced Cenosphere-coated paper cone that combines lightweight construction with exceptional rigidity.

Advantages include:

• Highly accurate midbass reproduction
• Fast transient response
• Reduced cone resonance
• Natural tonal balance
• Excellent internal damping

This innovative cone technology delivers detailed sound while preserving powerful and controlled bass reproduction.

Powerful Midbass Performance

The Ci3 W165-S2 has been engineered specifically for demanding two-way and three-way audio systems.

Key features include:

• 100 W RMS power handling
• 150 W peak power
• Frequency response: 60 Hz – 3,500 Hz
• Large ±3.7 mm linear excursion
• Powerful magnet system
• 25 mm high-temperature voice coil

The result is deep, punchy bass together with exceptionally clean lower midrange performance.

High-Tech Polymer Basket

The basket is manufactured from a glass-fiber reinforced high-tech polymer composite, providing outstanding rigidity while minimizing unwanted resonances.

Benefits include:

• Reduced distortion
• Improved thermal stability
• Compact installation dimensions
• Better magnetic stability
• Higher mechanical strength

Its compact construction also makes installation easier in modern vehicles with limited mounting depth.

ProConnect & FlexMount165 Technology

HELIX developed the Ci3 series for maximum installation flexibility.

Features include:

• Automotive-grade ProConnect connector
• Secure plug-and-play wiring compatibility
• Reverse polarity protection
• Compatibility with optional WireKits
• Support for FlexMount165 vehicle-specific adapters

This allows fast, clean and professional OEM integration without modifying factory wiring.

Key Benefits

• Premium 6.5-inch (165 mm) midbass speakers
• Sold as a pair (2 speakers)
• High-efficiency 2 Ohm technology
• 100 W RMS / 150 W Peak Power
• Wide frequency response (60 Hz – 3,500 Hz)
• Cenosphere-coated paper cone
• Large ±3.7 mm linear excursion
• Powerful magnet system
• Glass-fiber reinforced polymer basket
• ProConnect connector
• FlexMount165 compatible
• Excellent for OEM upgrades, DSP systems and aftermarket installations

Recommended Applications

The HELIX COMPOSE Ci3 W165-S2 is ideal for:

• OEM speaker upgrades
• DSP-controlled sound systems
• HELIX amplifier installations
• MATCH amplifier systems
• Front door midbass replacements
• High-performance 2-way systems
• Premium 3-way car audio systems

Technical Specifications

Why Choose HELIX COMPOSE Ci3 W165-S2?

The HELIX COMPOSE Ci3 W165-S2 offers exceptional performance for enthusiasts seeking more output, stronger bass and higher efficiency from their audio system. Its advanced 2 Ohm architecture, lightweight Cenosphere cone, ProConnect connectivity and FlexMount165 compatibility make it one of the best solutions for OEM upgrades and high-performance aftermarket installations.

Whether paired with a factory head unit, HELIX amplifier or a DSP-controlled system, the Ci3 W165-S2 delivers precise, dynamic and powerful sound with outstanding installation flexibility.

Upgrade Your Car Audio Experience

Enjoy stronger bass, higher efficiency and exceptional clarity with the HELIX COMPOSE Ci3 W165-S2. Designed for premium OEM integration and powerful midbass reproduction, these speakers provide the ideal foundation for a high-quality car audio system.