Precision Devices PD.154

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.6dB
• Frequency response 40 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 44.9Hz
• Mechanical quality factor QMS 20.44
• Electrical quality factor QES 0.27
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 7.7mm
• Air volume displaced at xmax VD 699cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.5Ω
• Inductance (1kHz) LE 1.03mH
• VC Diameter 101mm
• Winding height HVC 22mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.1T
• Force factor Bl 29.4N/A
• Motor constant Bl/√RE 11.5N/√W
• Air gap height HAG 11mm
• Material Ceramic

Diaphragm

• Effective diameter 340mm
• Effective area SD 908cm²
• Moving mass MMS 127g
• Moving mass (without air load) MMD 107g
• Material Paper

Suspensions

• Stiffness KMS 10.1N/mm
• Compliance CMS 99µm/N
• Equivalent volume to the compliance VAS 115L
• Mechanical resistance RMS 1.75N·s/m

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