Down4Sound SB8D4
2x2Ω
2x4Ω
Subwoofer
| Nominal diameter | 8″ / 216 mm |
| Resonance | 39.6 Hz |
| Q factor | 0.54 |
| Sensitivity | 81.3 dB |
| Linear excursion | ± 21 mm |
| Program Power | 1000 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 81.3dB
Thiele & Small parameters
- Resonance frequency (free air) fS 39.6Hz
- Mechanical quality factor QMS 3.12
- Electrical quality factor QES 0.66
- Total quality factor QTS 0.54
Large signal parameters
- Maximum linear excursion (one way) xmax 21mm
- Air volume displaced at xmax VD 441cm³
- Power handling P 500W
- Program power Pmax 1000W
Voice Coil
- Nominal impedance Z 2 x 4Ω
- DC resistance (in series) RE 5.8Ω
- Inductance (1kHz, in series, estimated) LE 3.35mH
- VC Diameter 63.5mm
Magnet
- Force factor (in series) Bl 17.1N/A
- Motor constant Bl/√RE 7.12N/√W
- Height 60mm
Diaphragm
- Effective diameter 164mm
- Effective area SD 210cm²
- Moving mass MMS 134g
- Moving mass (without air load) MMD 131g
Suspensions
- Stiffness KMS 8.28N/mm
- Compliance CMS 121µm/N
- Equivalent volume to the compliance VAS 9.33L
- Mechanical resistance RMS 0.773N·s/m
Dimensions
- Nominal diameter 8″
- 216mm
- Overall diameter 216mm
- Baffle cutout diameter 180mm
- Mounting depth 127mm
- Volume occupied by the driver 1.98L
- Net weight 13.608kg
Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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