Skar Audio DDX-12 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 34.2Hz
• Mechanical quality factor QMS 3.90
• Electrical quality factor QES 0.41
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 15mm
• Air volume displaced at xmax VD 765cm³
• Power handling P 1000W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 8.2Ω
• Inductance (1kHz, in series, estimated) LE 6.89mH
• VC Diameter 63.5mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 31.8N/A
• Motor constant Bl/√RE 11.1N/√W
• Diameter 193mm

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 235g
• Moving mass (without air load) MMD 227g
• Material Pressed Paper

Suspensions

• Stiffness KMS 14.3N/mm
• Compliance CMS 70µm/N
• Equivalent volume to the compliance VAS 25.9L
• Mechanical resistance RMS 13N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 12″
• 319mm
• Overall diameter 319mm
• Baffle cutout diameter 286mm
• Overall depth 191mm
• Flange thickness 24mm
• Mounting depth 167mm
• Volume occupied by the driver (estimated) 3.7L