Dayton Audio ND140-4

Mid Bass

Nominal diameter5.25″ / 138 mm
Resonance59.2 Hz
Q factor0.63
Sensitivity84.7 dB
Linear excursion± 4 mm
Program Power80 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 84.7dB
  • Frequency response 54 - 8000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 59.2Hz
  • Mechanical quality factor QMS 5.35
  • Electrical quality factor QES 0.72
  • Total quality factor QTS 0.63

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 4Ω
  • DC resistance RE 3.7Ω
  • Inductance (1kHz) LE 0.79mH
  • VC Diameter 25.4mm
  • Former material Kapton Polyimide

Magnet

  • Force factor Bl 3.9N/A
  • Motor constant Bl/√RE 2.03N/√W
  • Material Neodymium

Diaphragm

  • Effective diameter 105mm
  • Effective area SD 86.6cm²
  • Moving mass MMS 10.1g
  • Moving mass (without air load) MMD 9.5g
  • Material Black Anodized Aluminum

Suspensions

  • Stiffness KMS 1.41N/mm
  • Compliance CMS 710µm/N
  • Equivalent volume to the compliance VAS 7.22L
  • Mechanical resistance RMS 0.7N·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
Dayton Audio ND140-4 Impedance
Dayton Audio ND140-4 SPL
Dayton Audio ND140-4 Dimensions

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5.25 Mid Bass
fS56.5 Hz
SD86.6 cm²
54 - 8000 Hz
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SPL1W84.7 dB
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5 Mid Bass
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SD86.6 cm²
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