With notable influence from the sister brand BRAX and our uncompromising high-end philosophy, only the highest quality components, such as the proprietary, handmade UHD (Ultra High Damping) paper cone, are used in the i7 series. manufactured in a particularly complex process, this cone guarantees an optimal frequency- as well as the best possible impulse response for incomparable music enjoyment.
HELIX Ci7 4" Midrange
$858.00Price
Technical data
Power handling RMS / Max. P 100 / 150 Watts Impedance Z 3 Ω DC resistance Re 3.0 Ω Frequency response 110 Hz - 7,000 Hz Resonance frequency Fs 85 Hz Mechanical Q factor Qms 4.58 Electrical Q factor Qes 0.52 Total Q factor Qts 0.47 Compliance Cms 590 µm/N Equivalent air volume Vas 2.5 L Force factor B*I 4.3 Tm Sensitivity SPL 91 dB @ 2.83 V / 1m
87 dB @ 1W / 1mCone area Sd 55 cm² Moving mass Mms 5.9 g Cone material Ultra high damping (UHD) crafted paper cone Mechanical resistance Rms 0.69 kg/s Voice coil diameter ø 25 mm Voice coil winding height 5.5 mm Max. linear excursion Xmax +/- 1.3 mm Outer diameter ø 98 mm / 3.86" Outer diameter with universal mounting ring ø 104.5 mm / 4.11" Installation diameter ø 89 mm / 3.50" Installation depth 26.9 mm / 1.06"
