Precision Devices PD.188

Subwoofer

Nominal diameter18″ / 460 mm
Resonance36.2 Hz
Q factor0.26
Sensitivity96.8 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 96.8dB
  • Frequency response 40 - 3500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 36.2Hz
  • Mechanical quality factor QMS 13.04
  • Electrical quality factor QES 0.27
  • Total quality factor QTS 0.26

Large signal parameters

  • Maximum linear excursion xmax 6mm
  • Air volume displaced at xmax VD 681cm³
  • Power handling P 600W
  • Program power Pmax 1200W

Voice Coil

  • Nominal impedance Z 8Ω
  • DC resistance RE 5.9Ω
  • Inductance (1kHz) LE 1.55mH
  • VC Diameter 101mm
  • Winding height HVC 19mm
  • Winding material Copper
  • Former material Glass Fibre

Magnet

  • Flux density B 1.1T
  • Force factor Bl 29.3N/A
  • Motor constant Bl/√RE 12.1N/√W
  • Air gap height HAG 11mm
  • Material Ceramic

Diaphragm

  • Effective diameter 380mm
  • Effective area SD 1134cm²
  • Moving mass MMS 173g
  • Moving mass (without air load) MMD 145g
  • Material Paper

Suspensions

  • Stiffness KMS 8.97N/mm
  • Compliance CMS 112µm/N
  • Equivalent volume to the compliance VAS 202L
  • Mechanical resistance RMS 3.02N·s/m
  • Surround material Fabric

Dimensions

  • Nominal diameter 18
  • 460mm
  • Overall diameter 474mm
  • Baffle cutout diameter 415mm
  • Overall depth 187mm
  • Flange thickness 13mm
  • Mounting depth 174mm
  • Volume occupied by the driver (estimated) 7.1L
  • Net weight 14.0kg
Precision Devices PD.188 SPL & Impedance

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