HELIX coaxial speaker front and rear views showing the cone and mounting basket
HELIX coaxial speaker front and rear views showing the cone and mounting basket
HELIX coaxial speaker front and rear views with an award badge in the corner
HELIX coaxial speaker front and rear views with an award badge in the corner
HELIX rear speaker view showing the magnet label and connection terminals
HELIX rear speaker view showing the magnet label and connection terminals
HELIX angled rear view of the speaker basket and magnet label
HELIX angled rear view of the speaker basket and magnet label
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HELIX Ci3 C165.2FM-S3 MK2, 6.5" 2 Way Coaxial Speaker Pair, FlexMount, 3Ω

SKU: COMPOSECi3C1652FMS3MK2
Price
$425
Inc. GST. Most orders ship Australia wide for a flat $15.95. Larger or heavier items may cost more.
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Shipping information

Australia wide flat rate shipping is $15.95. Larger or heavier items may cost more; we will confirm when your order is processed. In stock items are dispatched within 1 to 2 business days. Report transit damage within 24 hours with photos so we can lodge a freight claim.

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HELIX coaxial speaker front and rear views showing the cone and mounting basket

HELIX Ci3 C165.2FM-S3 MK2, 6.5" 2 Way Coaxial Speaker Pair, FlexMount, 3Ω

$425

Product features

Before replacing a factory speaker, check its mounting space, impedance and connection. HELIX Ci3 C165.2FM-S3 MK2 is the HELIX speaker option described below. Its specifications help you match the driver to the amplifier and installation, rather than buying on diameter alone.

What it does

  • High efficiency and 3 Ohms technology for maximised power output of the amplifier
  • Driver development verified with Klippel Analyzer System
  • Automotive grade ProConnect connection terminal allows the use of conventional speaker cables or a fast, secure and fail safe connection via optionally available WireKits
  • 0.75” / 20 mm performance tweeter with black aluminium dome for accurate, pure and detailed treble response
  • Refined highly efficient neodymium magnet for high magnetic flux linearity and optimised performance
  • 6.5" / 165 mm midbass with unique Cenosphere coated paper cone for precise and detailed sound reproduction
  • Powerful magnet system for high efficiency and optimum impulse response
  • Integrated tweeter highpass crossover with a 6 dB slope

Specifications

  • Brand: HELIX
  • Distributor product code: COMPOSE Ci3 C165.2FM-S3 MK2
  • Product: HELIX Ci3 C165.2FM-S3 MK2, 6.5" 2 Way Coaxial Speaker Pair, FlexMount, 3Ω
Power handling RMS / Max. P 100 / 150 Watts
Frequency response 60 Hz to 25,000 Hz
Impedance Z 3 Ω
Sensitivity SPL 92 dB @ 2.83V / 1m 88 dB @ 1W / 1m
Outer diameter ø 165.0 mm / 6.50”
Installation diameter ø 142.0 mm / 5.59”
Installation depth 60.7 mm / 2.39”
Midbass
Impedance Z 3 Ω
DC resistance Re 3.1 Ω
Resonance frequency Fs 72 Hz
Mechanical Q factor Qms 4.02
Electrical Q factor Qes 1.04
Total Q factor Qts 0.82
Compliance Cms 466 μm/N
Equivalent air volume Vas 11.5 L
Force factor B*l 3.8 Tm
Cone area Sd 133 cm 2
Moving mass Mms 10.4 g
Mechanical resistance Rms 1.17 kg/s
Voice coil diameter ø 25 mm
Voice coil winding height 10.5 mm
Max. linear excursion Xmax ± 3.2 mm
Tweeter
Voice coil diameter ø 20 mm
Features
Tweeter Aluminium dome and neodymium magnet
Midbass Paper with Cenosphere coating, ProConnect terminal and FlexMount165
Crossover Integrated, 6 dB highpass

Fitment and compatibility

FlexMount165

WireKits

Match the mounting measurements, impedance and amplifier requirements before installation. Speaker diameter alone does not confirm vehicle fitment.

In the box

Listed by the manufacturer:

  • 2 x Ci3 C165.2FM-S3 MK2
  • 1 x Mounting material

Installation

Have a qualified car audio installer check the mounting, wiring and system setup before fitting. Frankies workshops at Albion Park Rail (02) 4257 2636 and South Nowra (02) 4423 5254 can quote on installation.

Warranty

Your purchase is covered by the Australian Consumer Law. Contact Frankies for the warranty terms that apply to this model.

Questions and answers

What am I buying?

HELIX Ci3 C165.2FM-S3 MK2, 6.5" 2 Way Coaxial Speaker Pair, FlexMount, 3Ω. Check the specifications and selected option above for the version supplied.

What equipment is it compatible with?

FlexMount165 WireKits

What impedance does it use?

Impedance Z 3 Ω. Match the final load and voice coil wiring to a suitable amplifier.

What power rating should I use?

Power handling RMS / Max. P 100 / 150 Watts. RMS and maximum ratings are different. Check the conditions in the specification table.

What mounting space do I need?

Installation depth 60.7 mm / 2.39”. Check the available depth and clearance in your installation before ordering.

What is supplied?

The manufacturer lists 2 x Ci3 C165.2FM-S3 MK2, 1 x Mounting material.

What warranty applies?

Your purchase is covered by the Australian Consumer Law. Contact Frankies for the warranty terms for this model.