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Helix CB C87.2-S3 - 3Ohm
Helix Compose Basic 87mm / 3.5″ - 2-way coaxial speaker.
Helix Basic is the most affordable model in the Compose series and offers a great price/quality ratio!
Like other Compose models, Basic was developed in-car, which means it has been optimized specifically for in-car use.
One of the key elements of the Compose series is a patented mounting system called FlexMount, which is based on specially developed speaker adapters.<br>
This technology allows you to install Compose Basic speakers in an almost infinite number of car models by simply changing the adapter ring that fits your car.
Specifications:
Power handling RMS / Max. P 40 / 60 Watts
Frequency response 110 Hz to 22,000 Hz
Impedance Z 3 Ω
Sensitivity SPL 88 dB @ 2.83V / 1m
84 dB @ 1W / 1m
Outer diameter ø 86.9 mm / 3.43"
Installation diameter ø 79.0 mm / 3.11”
Installation depth 42.0 mm / 1.65”
Midrange
Impedance Z 3 Ω
DC resistance Re 3.0 Ω
Resonance frequency Fs 92 Hz
Mechanical Q factor Qms 3.80
Electrical Q factor Qes 0.74
Total Q factor Qts 0.62
Compliance Cms 820 μm/N
Equivalent air volume Vas 1.5 L
Force factor B*l 2.9 Tm
Cone area Sd 36 cm2
Moving mass MMS 3.6 g
Mechanical resistance Rms 0.52 kg/s
Voice coil diameter ø 25 mm
Voice coil winding height
8.3 mm
Max. linear excursion Xmax +/- 2.2 mm
Tweeter
Voice coil diameter ø 13 mm
Features
Tweeter PEI Dome and neodymium magnet
Midbass
Injected polypropylene cone
Crossover Integrated, 6 dB highpass