Helix Ci5 M80FM-D3 CTR – 80 mm Center Speaker with eCall-Compatible Dual Voice Coil

The Ci5 M80FM-D3 CTR is a 3.15″ (80 mm) broadband center speaker 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 i5 series sits between i7 and i3 for listeners who want true hi-fi sound, and the 3 Ω design is matched to HELIX and MATCH amplifiers. Supplied as a single speaker, it is designed for the center channel of multi-way systems, with a wide linear frequency range for clear speech and dynamic sound at high levels.

Its key feature is a second, separate voice coil: one coil carries the music signal while the other keeps the factory eCall emergency call system connected, so the original center speaker can be replaced without losing that function. The outer diameter is smaller than that of a conventional 80 mm driver while the cone area is not reduced. A silicon-coated paper cone, a narrow inward-folded rubber surround, an aluminum dustcap and a push-pull neodymium magnet system work together for accurate, efficient sound.

Key Features

eCall compatibility: separate second voice coil keeps the factory emergency call system working.
Broadband center driver: wide frequency range of 200 – 16,000 Hz for clear speech reproduction.
3 Ω technology: more amplifier output and efficiency with HELIX and MATCH amplifiers.
Silicon-coated paper cone: high internal damping for good impulse and frequency response.
Aluminum dustcap: enhances upper-midrange performance.
Rubber surround: narrow, inward-folded and specially shaped for high linear excursion (Xlin ±2.5 mm).
Larger effective cone area: smaller installation diameter and larger effective cone area than typical 80 mm speakers.
Push-pull neodymium magnet: high efficiency and very low distortion.
Glass-bead reinforced polymer basket: rigid, minimal ringing, resistant to thermal effects.
FlexConnect terminal: automotive-grade, fail-safe connection with reverse polarity protection.
FlexMount80 and FlexMount100: universal FlexMount80 rings and the CFM80-100 adaptor ring are included.
WireKits ready: optional car-specific cables for non-destructive integration.

Drivers & Construction

Cone: silicon-coated paper, cone area (Sd) 36 cm².
Dustcap: aluminum.
Voice coil: dual voice coil (music + eCall), 21 mm diameter, 7.3 mm winding height.
Magnet: push-pull neodymium system.
Basket: polymer composite reinforced with glass beads.
Terminal: FlexConnect.

Acoustic Performance

Power handling: 90 W RMS / 135 W max.
Impedance: 2 x 3 Ω (DC resistance 3.1 Ω).
Sensitivity: 87 dB @ 2.83 V / 1 m; 83 dB @ 1 W / 1 m.
Frequency response: 200 – 16,000 Hz.
T/S parameters: Fs 175 Hz, Qms 4.29, Qes 2.15, Qts 1.43, Vas 0.44 l, Cms 260 µm/N, BxL 2.24 Tm, Mms 3.19 g, Rms 0.82 kg/s.
Excursion: max. linear excursion (Xlin) ±2.5 mm; max. mechanical excursion (Xmax) ±4.5 mm.

Installation Notes

Dimensions: outer diameter 78.5 mm (3.09″), installation diameter 69.5 mm (2.74″), installation depth 30.1 mm (1.18″).
Included parts: universal FlexMount rings CFM80 MULTI.1 & MULTI.2, CFM80-100 adaptor ring, universal connection cable, FlexConnect inlay set (A, B, C, D), speaker gasket and mounting material.
FlexMount100: with the included CFM80-100 ring, separately sold FlexMount100 adaptors can be used for 100 mm positions.
Compatible accessories: FlexConnect inlays and WireKits (sold separately).

Technical Specifications

Power handling RMS / Max.	P	90 / 135 Watts
Impedance	Z	2 x 3 Ω
DC resistance	Re	3.1 Ω
Frequency response		200 Hz – 16,000 Hz
Resonance frequency	Fs	175 Hz
Mechanical Q factor	Qms	4.29
Electrical Q factor	Qes	2.15
Total Q factor	Qts	1.43
Compliance	Cms	260 µm/N
Equivalent air volume	Vas	0.44 L
Force factor	BI*	2.24 Tm
Sensitivity	SPL	87 dB @ 2.83 V / 1m 83 dB @ 1W / 1m
Cone area	Sd	36 cm²
Moving mass	Mms	3.19 g
Cone material		Silicon coated paper cone
Mechanical resistance	Rms	0.82 kg/s
Voice coil diameter	ø	21 mm
Voice coil winding height		7.3 mm
Max. linear excursion	Xlin	+/- 2.5 mm
Max. mechanical excursion	Xmax	+/- 4.5 mm
Outer diameter	ø	78.5 mm / 3.09″
Installation diameter	ø	69.5 mm / 2.74″
Installation depth		30.1 mm / 1.18″
Features		FlexConnect terminal, powerful push-pull neodymium magnet system, FlexMount80

Scope of Delivery

1 x Ci5 M80FM-D3 CTR
1 x Universal FelxMount CFM80 MULTI.1 & MULTI.2
1 x Adaptor ring CFM80-100
1 x Universal connection cable
1 x FlexConnect inlay set (A, B, C, D)
1 x Speaker gasket
1 x Mounting material

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