Precision Devices PD.158

Subwoofer

Nominal diameter15″ / 380 mm
Resonance54.6 Hz
Q factor0.24
Sensitivity100.3 dB
Linear excursion± 6 mm
Program power1200 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 100.3dB
  • Frequency response 40 - 3000Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 54.6Hz
  • Mechanical quality factor QMS 14.91
  • Electrical quality factor QES 0.25
  • Total quality factor QTS 0.24

Large signal parameters

  • Maximum linear excursion (one way) xmax 6mm
  • Air volume displaced at xmax VD 513cm³
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.8Ω
  • Inductance (1kHz) LE 0.76mH
  • VC Diameter 101mm
  • Winding height HVC 19mm
  • Winding material Copper
  • Former material Glass Fibre

Magnet

  • Flux density B 1.1T
  • Force factor Bl 25.4N/A
  • Motor constant Bl/√RE 10.6N/√W
  • Air gap height HAG 11mm
  • Material Ceramic

Diaphragm

  • Effective diameter 330mm
  • Effective area SD 855cm²
  • Moving mass (including air load) MMS 85.2g
  • Moving mass MMD 67g
  • Material Paper

Suspensions

  • Stiffness KMS 9.32N/mm
  • Compliance CMS 107µm/N
  • Equivalent volume to the compliance VAS 64.8L
  • Mechanical resistance RMS 1.96N·s/m
  • Surround material Fabric

Dimensions

  • Nominal diameter 15
  • 380mm
  • Overall diameter 410mm
  • Baffle cutout diameter 357mm
  • Overall depth 156mm
  • Flange thickness 10mm
  • Mounting depth 146mm
  • Volume occupied by the driver (estimated) 5.5L
  • Net weight 13.0kg
Precision Devices PD.158 SPL & Impedance

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