PRV Audio 21SW4000-NDY-2

Subwoofer

Nominal diameter21″ / 547 mm
Resonance30.8 Hz
Q factor0.28
Sensitivity95.9 dB
Linear excursion± 15 mm
Program Power4000 W
Discontinued
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 95.9dB
  • Frequency response 35 - 1200Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 30.8Hz
  • Mechanical quality factor QMS 12.33
  • Electrical quality factor QES 0.28
  • Total quality factor QTS 0.28

Large signal parameters

  • Maximum linear excursion xmax 15mm
  • Air volume displaced at xmax VD 2886cm³
  • Power handling P 2000W
  • Program power Pmax 4000W

Voice Coil

  • Nominal impedance Z 2Ω
  • DC resistance RE 1.8Ω
  • Inductance (1kHz) LE 1.14mH
  • VC Diameter 134.6mm
  • Winding height HVC 39mm
  • Winding material Copper
  • Former material Glass Fiber

Magnet

  • Force factor Bl 24.4N/A
  • Motor constant Bl/√RE 18.2N/√W
  • Air gap height HAG 18mm
  • Material Neodymium

Diaphragm

  • Effective diameter 495mm
  • Effective area SD 1924cm²
  • Moving mass MMS 485g
  • Moving mass (without air load) MMD 430g

Suspensions

  • Stiffness KMS 18.2N/mm
  • Compliance CMS 55µm/N
  • Equivalent volume to the compliance VAS 285L
  • Mechanical resistance RMS 7.61N·s/m

Dimensions

  • Nominal diameter 21
  • 547mm
  • Overall diameter 547mm
  • Baffle cutout diameter 508mm
  • Overall depth 265mm
  • Flange thickness 20mm
  • Mounting depth 245mm
  • Volume occupied by the driver (estimated) 9.6L
  • Net weight 13.7kg
  • Frame material Die Cast Aluminum
PRV Audio 21SW4000-NDY-2 SPL
PRV Audio 21SW4000-NDY-2 Dimensions

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