Dayton Audio ND140-8
4Ω
8Ω
Mid Bass
Nominal diameter | 5.25″ / 138 mm |
Resonance | 56.5 Hz |
Q factor | 0.68 |
Sensitivity | 84.7 dB |
Linear excursion | ± 4 mm |
Program Power | 80 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 84.7dB
- Frequency response 54 - 8000Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 56.5Hz
- Mechanical quality factor QMS 5.01
- Electrical quality factor QES 0.79
- Total quality factor QTS 0.68
Large signal parameters
- Maximum linear excursion xmax 4mm
- Air volume displaced at xmax VD 35cm³
- Power handling P 40W
- Program power Pmax 80W
Voice Coil
- Nominal impedance Z 8Ω
- DC resistance RE 7.8Ω
- Inductance (1kHz) LE 1.44mH
- VC Diameter 25mm
- Winding material Copper
- Former material Kapton® / Polyimide
Magnet
- Force factor Bl 6.05N/A
- Motor constant Bl/√RE 2.17N/√W
- Material Neodymium
Diaphragm
- Effective diameter 105mm
- Effective area SD 86.6cm²
- Moving mass MMS 10.4g
- Moving mass (without air load) MMD 9.8g
- Material Black Anodized Aluminum
Suspensions
- Stiffness KMS 1.32N/mm
- Compliance CMS 760µm/N
- Equivalent volume to the compliance VAS 7.74L
- Mechanical resistance RMS 0.74N·s/m
- Surround material Rubber
Dimensions
- Nominal diameter 5.25″
- 138mm
- Overall diameter 138mm
- Baffle cutout diameter 120mm
- Overall depth 71mm
- Volume occupied by the driver (estimated) 0.32L
- Frame material Steel
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