Helix Ci7 W130-S3

Helix Ci7 W130-S3 – 130 mm High-End Midbass with UHD Paper Cone

The Ci7 W130-S3 is a 5.25″ (130 mm) high-end midbass from the HELIX COMPOSE platform, which re-engineers universal speakers so they combine universal flexibility with vehicle-specific advantages – “developed inside the vehicle, for the vehicle”. The i7 series is the high-end line of COMPOSE, made in Germany and clearly influenced by the sister brand BRAX; its impedances are matched to HELIX and MATCH amplifiers. With its 3 Ω design it delivers more efficiency and maximum sound pressure from compatible amplifiers and serves as the midbass of a component system.

It uses the proprietary, handmade UHD (Ultra High Damping) paper cone for excellent frequency and impulse response, mounted in a basket made of polymer composite reinforced with glass beads – rigid, low in self-resonance, with reduced magnetic flux modulation and good thermal resistance, allowing a more compact basket. The automotive-grade ProConnect terminal is interlocked and reverse-polarity protected, and accepts standard speaker cables, flat-plug adaptor cables or car-specific WireKits.

Key Features

• 3 Ω technology: higher amplifier output and efficiency with HELIX and MATCH amplifiers.
• UHD paper cone: handmade Ultra High Damping cone for excellent impulse and frequency response.
• Glass-bead reinforced polymer basket: high rigidity and minimal ringing.
• Shaped rubber surround: for high linear cone excursion (Xmax ±3.4 mm).
• Polyurethane dustcap: optimized for upper-midrange response.
• 25 mm (1″) voice coil: for thermal stability and high power handling.
• Powerful magnet system: for high efficiency and low distortion.
• ProConnect terminal: automotive-grade, interlocked and reverse-polarity protected.
• WireKits ready: optional car-specific cables for non-destructive integration into the vehicle wiring.
• Made in Germany: part of the German-made COMPOSE i7 series.

Drivers & Construction

• Cone: UHD crafted paper, cone area (Sd) 85 cm².
• Voice coil: 25 mm diameter, 12.8 mm winding height.
• Basket: polymer composite reinforced with glass beads.
• Surround / dustcap: rubber surround, polyurethane dustcap.
• Terminal: ProConnect.

Acoustic Performance

• Power handling: 120 W RMS / 180 W max.
• Impedance: 3 Ω (DC resistance 2.9 Ω).
• Sensitivity: 92 dB @ 2.83 V / 1 m; 88 dB @ 1 W / 1 m.
• Frequency response: 70 – 4,000 Hz.
• T/S parameters: Fs 73 Hz, Qms 2.38, Qes 0.50, Qts 0.41, Vas 4.3 l, Cms 420 µm/N, BxL 5.5 Tm, Mms 11.1 g, Rms 2.15 kg/s.
• Max. linear excursion (Xmax): ±3.4 mm.

Installation Notes

• Dimensions: outer diameter 130 mm (5.12″), installation diameter 116.5 mm (4.59″), installation depth 58.5 mm (2.31″).
• WireKits: compatible; the page lists e.g. CWK FX.W-550CC and CWK TES1.W-225PC as accessories.
• Passive crossover option: the Ci7 FX-UNI.2 crossover is listed among the accessories.

Technical Specifications

Scope of Delivery

2 x Ci7 W130-S3
2 x Connection cable
2 x Mounting material