Precision Devices PD.184C01

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.4dB
• Frequency response 40 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 15.20
• Electrical quality factor QES 0.23
• Total quality factor QTS 0.23

Large signal parameters

• Maximum linear excursion xmax 8mm
• Maximum excursion before damage xlim 16mm
• Air volume displaced at xmax VD 931cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 4.8Ω
• Inductance (1kHz) LE 0.47mH
• VC Diameter 101mm
• Winding height HVC 22mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 0.98T
• Force factor Bl 25.2N/A
• Motor constant Bl/√RE 11.5N/√W
• Air gap height HAG 11mm
• Material Ceramic

Diaphragm

• Effective diameter 385mm
• Effective area SD 1164cm²
• Moving mass MMS 163g
• Moving mass (without air load) MMD 135g
• Material Paper

Suspensions

• Stiffness KMS 5.56N/mm
• Compliance CMS 180µm/N
• Equivalent volume to the compliance VAS 337L
• Mechanical resistance RMS 2.03N·s/m

Dimensions

• Nominal diameter 18″
• 460mm
• Overall diameter 474mm
• Baffle cutout diameter 416mm
• Overall depth 174mm
• Flange thickness 15mm
• Mounting depth 159mm
• Volume occupied by the driver (estimated) 6.8L
• Net weight 14.0kg