Skar Audio IX-12 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 35.1Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.69
• Total quality factor QTS 0.62

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 357cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.1Ω
• Inductance (1kHz, in series, estimated) LE 3.12mH
• VC Diameter 50.8mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 14.8N/A
• Motor constant Bl/√RE 5.99N/√W
• Diameter 140mm

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 112g
• Moving mass (without air load) MMD 103g
• Material Pressed Paper

Suspensions

• Stiffness KMS 5.44N/mm
• Compliance CMS 184µm/N
• Equivalent volume to the compliance VAS 67.8L
• Mechanical resistance RMS 4.18N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 12″
• 314mm
• Overall diameter 314mm
• Baffle cutout diameter 284mm
• Overall depth 155mm
• Flange thickness 21mm
• Mounting depth 134mm
• Volume occupied by the driver (estimated) 2.7L