HELIX S 4B – 4″ Mid-Woofer
£79.99
Description
HELIX S 4B
High-Precision Mid-Woofer for Superior Sound
The HELIX S 4B mid-woofer is engineered for clarity and accuracy, even at high volume levels. Its innovative cone is made from a basalt-fiber-paper compound, combining low weight, high stiffness, and excellent internal damping to deliver clean, precise sound with powerful bass and neutral mids. Distortion is exceptionally low, ensuring an immersive listening experience.
Perfect System Integration
Pair the S 4B with the S 1T tweeter to cover the full frequency spectrum. When combined with an Audiotec Fischer power amplifier, the S series achieves its peak performance, providing a solid foundation for premium automotive sound systems.
Features
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4” / 100 mm mid-woofer with basalt-fiber-paper compound cone for lightweight rigidity and precise sound
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Specially shaped rubber surround for increased cone excursion and effective area
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Custom HELIX basket with ventilation holes for enhanced voice coil cooling and high power handling
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Rugged rubber magnet boot with HELIX logo
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Gold-plated terminals for reliable connectivity
Technical dataPower RMS / max. P 70 / 140 Watts Impedance Z 4 Ω DC resistance Re 3.4 Ω Frequency response 75 Hz – 6,000 Hz Resonance frequency Fs 120 Hz Mechanical Q factor Qms 4.24 Electrical Q factor Qes 1.11 Total Q factor Qts 0.88 Compliance Cms 232 μm/N Equivalent air volume Vas 1.2 L Force factor B*I 4.1 Tm Sensitivity 1 W / 1 m SPL 89 dB Cone area Sd 61 cm² Moving mass Mms 5.9 g Cone material Basalt-fiber-paper compound Mechanical resistance Rms 1.19 kg/s Voice coil diameter ø 25 mm Voice coil winding height 12 mm Max. linear excursion Xmax +/- 3 mm Outer diameter ø 102 mm / 4.01″ Installation diameter ø 92.3 mm / 3.63″ Installation depth 46.5 mm / 1.83″ Recommended enclosure volumes Sealed box Net volume 3 L Lower limiting frequency (-3dB) 100 Hz Scope of delivery
2 x Mid-woofer HELIX S 4B
1 x Mounting material
1 x Data sheet
1 x Mounting pattern
