Dayton Audio ND140-8

Mid Bass

Nominal diameter5.25″ / 138 mm
Resonance56.5 Hz
Q factor0.68
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 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
Dayton Audio ND140-8 Impedance
Dayton Audio ND140-8 SPL
Dayton Audio ND140-8 Dimensions

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4 Ω
5.25 Mid Bass
fS59.2 Hz
SD86.6 cm²
54 - 8000 Hz
QTS0.63
xmax4 mm
SPL1W84.7 dB
Bl/√RE2.03
Pmax80 W
Goldwood GW-6024 Woofer

Goldwood GW-6024

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6.5 Woofer
fS53.7 Hz
SD136 cm²
29 - 4800 Hz
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