Down4Sound DBz10D4

2x2Ω
2x4Ω

Subwoofer

Nominal diameter10″ / 274 mm
Resonance40.8 Hz
Q factor0.42
Sensitivity87.2 dB
Linear excursion± 28 mm
Program Power2600 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 87.2dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 40.8Hz
  • Mechanical quality factor QMS 2.36
  • Electrical quality factor QES 0.51
  • Total quality factor QTS 0.42

Large signal parameters

  • Maximum linear excursion (one way) xmax 28mm
  • Air volume displaced at xmax VD 1577cm³
  • Power handling P 1300W
  • Program power Pmax 2600W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.1Ω
  • Inductance (1kHz, in series, estimated) LE 6.38mH
  • VC Diameter 69.9mm

Magnet

  • Force factor (in series) Bl 31.7N/A
  • Motor constant Bl/√RE 12.9N/√W
  • Diameter 190mm

Diaphragm

  • Effective diameter 268mm
  • Effective area SD 563cm²
  • Moving mass MMS 331g
  • Moving mass (without air load) MMD 323g
  • Material Carbon fiber dustcap

Suspensions

  • Stiffness KMS 21.8N/mm
  • Compliance CMS 45.9µm/N
  • Equivalent volume to the compliance VAS 8.6L
  • Mechanical resistance RMS 0.795N·s/m

Dimensions

  • Nominal diameter 10
  • 274mm
  • Overall diameter 274mm
  • Baffle cutout diameter 240mm
  • Mounting depth 187mm
  • Volume occupied by the driver 2.55L
  • Net weight 14.4kg

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