HELIX PURE S 4B
4Ω
Mid Bass
| Nominal diameter | 4″ / 100 mm |
| Resonance | 120 Hz |
| Q factor | 0.88 |
| Sensitivity | 86.9 dB |
| Linear excursion | ± 3 mm |
| Program Power | 140 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 86.9dB
- Frequency response 75 - 6000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 120Hz
- Mechanical quality factor QMS 4.24
- Electrical quality factor QES 1.11
- Total quality factor QTS 0.88
Large signal parameters
- Maximum linear excursion (one way) xmax 3mm
- Air volume displaced at xmax VD 18cm³
- Power handling P 70W
- Program power Pmax 140W
Voice Coil
- Nominal impedance Z 4Ω
- DC resistance RE 3.4Ω
- Inductance (1kHz, estimated) LE 0.25mH
- VC Diameter 25mm
- Winding height HVC 12mm
Magnet
- Force factor Bl 4.1N/A
- Motor constant Bl/√RE 2.22N/√W
Diaphragm
- Effective diameter 88mm
- Effective area SD 61cm²
- Moving mass MMS 5.9g
- Moving mass (without air load) MMD 5.6g
Suspensions
- Stiffness KMS 4.31N/mm
- Compliance CMS 232µm/N
- Equivalent volume to the compliance VAS 1.2L
- Mechanical resistance RMS 1.19N·s/m
Dimensions
- Nominal diameter 4″
- 100mm
- Overall diameter 102mm
- Baffle cutout diameter 92mm
- Mounting depth 47mm
- Volume occupied by the driver (estimated) 0.14L
Export this driver to a simulation software:
Closed Box Simulator·
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MfbLabs
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