Skar Audio VD-12 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 36.6Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.70
• Total quality factor QTS 0.60

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 561cm³
• Power handling P 500W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 4.12mH
• VC Diameter 50.8mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 18.2N/A
• Motor constant Bl/√RE 7.19N/√W
• Diameter 152mm

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 158g
• Moving mass (without air load) MMD 149g
• Material Pressed Paper

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 44.3L
• Mechanical resistance RMS 8.63N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 12″
• 319mm
• Overall diameter 319mm
• Baffle cutout diameter 287mm
• Overall depth 151mm
• Flange thickness 25mm
• Mounting depth 126mm
• Volume occupied by the driver (estimated) 2.7L