Skar Audio SDR-12 D2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 32Hz
• Mechanical quality factor QMS 6.76
• Electrical quality factor QES 0.58
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 13.5mm
• Air volume displaced at xmax VD 636cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.2Ω
• Inductance (1kHz, in series, estimated) LE 2.8mH
• VC Diameter 63.5mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 16.7N/A
• Motor constant Bl/√RE 9.32N/√W
• Diameter 155mm

Diaphragm

• Effective diameter 245mm
• Effective area SD 471cm²
• Moving mass MMS 249g
• Moving mass (without air load) MMD 242g
• Material Pressed Paper

Suspensions

• Stiffness KMS 8.7N/mm
• Compliance CMS 115µm/N
• Equivalent volume to the compliance VAS 36.2L
• Mechanical resistance RMS 7.42N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 12″
• 308mm
• Overall diameter 308mm
• Baffle cutout diameter 285mm
• Overall depth 192mm
• Flange thickness 27mm
• Mounting depth 165mm
• Volume occupied by the driver (estimated) 3.5L