S 4B

SKU: S721400

Helix

Midbass 4″ 70W

HELIX S 4B

Elegant designed mid-woofer trimmed for maximum sound quality.
The extremely rigid cone consists of a novel basalt-fiber-paper compound – the perfect combination to guarantee clear and straight sound even at high volume levels. Beside a powerful bass reproduction and peerlessly neutral mids, the S 4B impresses with exceptionally low distortion.

A dream team is the combination with the S 1T tweeter that ideally complements the frequency range. Together with an Audiotec Fischer power amplifier, the S loudspeakers strike up to top form and provide the perfect basis for absolute top sound systems!

Features

  • 4” / 100 mm mid-woofer with novel basalt-fiber-paper compound cone – a perfect combination of lowest weight, high stiffness and inner damping
  • Specially shaped rubber surround for larger effective cone area and increased maximum excursion
  • Individual HELIX basket with additional ventilation holes for better voice coil cooling and high power handling
  • Rugged rubber magnet boot with HELIX-logo
  • Gold-plated terminals

 

SKU: S721400 Category: Tags: , , , ,
Brand

Speakers Type (Car)

,

Series

Technical data

Power RMS / max. 70 / 140 Watts
Impedance 4 Ω
DC resistance 3.4 Ω
Frequency response 75 Hz – 6,000 Hz
Resonance frequency 120 Hz
Mechanical Q factor  4.24
Electrical Q factor 1.11
Total Q factor 0.88
Compliance 232 μm/N
Equivalent air volume 1.2 L
Force factor  4.1 Tm
Sensitivity 1 W / 1 m 89 dB
Cone area 61 cm²
Moving mass  5.9 g
Cone material Basalt-fiber-paper compound
Mechanical resistance  1.19 kg/s
Voice coil diameter 25 mm
Voice coil winding height 12 mm
Max. linear excursion  +/- 3 mm
Outer diameter 102 mm / 4.01″
Installation diameter 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

 

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Product Datasheet

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