Precision Devices PD.185C001

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.8dB
• Frequency response 30 - 300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 8.42
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 10.5mm
• Air volume displaced at xmax VD 1220cm³
• Power handling P 1200W
• Program power Pmax 2400W
• Peak power Ppeak 4800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 3.8mH
• VC Diameter 127mm
• Winding height HVC 25mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 0.96T
• Force factor Bl 21N/A
• Motor constant Bl/√RE 8.65N/√W
• Air gap height HAG 9mm
• Diameter 220mm
• Material Ceramic

Diaphragm

• Effective diameter 385mm
• Effective area SD 1162cm²
• Moving mass MMS 157g
• Moving mass (without air load) MMD 129g
• Material Paper

Suspensions

• Stiffness KMS 6.35N/mm
• Compliance CMS 157µm/N
• Equivalent volume to the compliance VAS 302L
• Mechanical resistance RMS 3.75N·s/m
• Surround material Fabric
• Spider material Fabric

Dimensions

• Nominal diameter 18″
• 457mm
• Overall diameter 474mm
• Baffle cutout diameter 415mm
• Overall depth 197mm
• Flange thickness 15mm
• Mounting depth 182mm
• Volume occupied by the driver (estimated) 7L
• Net weight 13.0kg