Precision Devices PD.185N002

• Sensitivity (1W, 1m, infinite baffle) SPL1W 95.6dB
• Frequency response 30 - 300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 36Hz
• Mechanical quality factor QMS 3.10
• Electrical quality factor QES 0.33
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 11.5mm
• Air volume displaced at xmax VD 1338cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.4Ω
• Inductance (1kHz) LE 3.07mH
• VC Diameter 127mm
• Winding height HVC 29mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.2T
• Force factor Bl 25N/A
• Motor constant Bl/√RE 10.8N/√W
• Air gap height HAG 13.5mm
• Material Neodymium

Diaphragm

• Effective diameter 385mm
• Effective area SD 1163cm²
• Moving mass MMS 173g
• Moving mass (without air load) MMD 144g

Suspensions

• Stiffness KMS 8.5N/mm
• Compliance CMS 118µm/N
• Equivalent volume to the compliance VAS 226L
• Mechanical resistance RMS 12.6N·s/m

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 474mm
• Baffle cutout diameter 414mm
• Overall depth 174mm
• Flange thickness 15mm
• Mounting depth 159mm
• Volume occupied by the driver (estimated) 6L
• Net weight 11.5kg