HELIX S 4B
- Order number: S721400
- WEEE-Reg.-Nr. DE 29323089
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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
Technical data
| Power 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
