Helix Ci7 C165.2FM-S3

Technical data

Power handling RMS / Max. P 150 / 225 Watts
Frequency response 50 Hz - 30,000 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 65.8 mm / 2.59”

Midbass
Impedance Z 3 Ω
DC resistance Re 3.0 Ω
Resonance frequency Fs 59 Hz
Mechanical Q factor Qms 3.99
Electrical Q factor Qes 0.64
Total Q factor Qts 0.55
Compliance Cms 572 μm/N
Equivalent air volume Vas 13.3 L
Force factor B*l 4.7 Tm
Cone area Sd 131 cm2
Moving mass Mms 13.0 g
Mechanical resistance Rms 1.21 kg/s
Voice coil diameter ø 37 mm
Voice coil winding height
  13.4 mm
Max. linear excursion Xmax +/- 3.7 mm

Tweeter
Impedance Z 4 Ω
Voice coil diameter ø 20 mm

Features
Tweeter Silk dome with coupling volume
Midbass
Ultra high damping (UHD) crafted paper cone, ProConnect terminal
and FlexMount165
Crossover 2-way active: two amplified DSP channels per speaker required
2-way passive: i7 FX-UNI.2 optionally available