Precision Devices PD.123C001

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.8dB
• Frequency response 45 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 7.50
• Electrical quality factor QES 0.15
• Total quality factor QTS 0.14

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Air volume displaced at xmax VD 410cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.5Ω
• Inductance (1kHz) LE 2.17mH
• VC Diameter 76.2mm
• Winding height HVC 21mm
• Winding material Copper
• Former material Glass Fibre

Magnet

• Flux density B 1.2T
• Force factor Bl 24.5N/A
• Motor constant Bl/√RE 10.4N/√W
• Air gap height HAG 11mm
• Weight 3.3kg
• Material Ferrite Y30

Diaphragm

• Effective diameter 264mm
• Effective area SD 547cm²
• Moving mass MMS 70g
• Moving mass (without air load) MMD 60.6g

Suspensions

• Stiffness KMS 3.47N/mm
• Compliance CMS 288µm/N
• Equivalent volume to the compliance VAS 122L
• Mechanical resistance RMS 2.05N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Overall diameter 331mm
• Baffle cutout diameter 279mm
• Overall depth 121mm
• Flange thickness 10mm
• Mounting depth 111mm
• Volume occupied by the driver (estimated) 3.4L
• Net weight 9.7kg