Skar Audio VD-8 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 45.3Hz
• Mechanical quality factor QMS 3.85
• Electrical quality factor QES 0.62
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 10.3mm
• Air volume displaced at xmax VD 314cm³
• Power handling P 400W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 5.0Ω
• Inductance (1kHz, in series, estimated) LE 3.84mH
• VC Diameter 50.8mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 30.8N/A
• Motor constant Bl/√RE 9.74N/√W
• Diameter 133mm

Diaphragm

• Effective diameter 198mm
• Effective area SD 307cm²
• Moving mass MMS 206g
• Moving mass (without air load) MMD 202g
• Material Pressed Paper

Suspensions

• Stiffness KMS 16.7N/mm
• Compliance CMS 60µm/N
• Equivalent volume to the compliance VAS 8L
• Mechanical resistance RMS 15.2N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 8″
• 216mm
• Overall diameter 216mm
• Baffle cutout diameter 187mm
• Overall depth 126mm
• Flange thickness 24mm
• Mounting depth 102mm
• Volume occupied by the driver (estimated) 1.2L