Skar Audio IVX-12v2 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
• Frequency response 35 - 600Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 3.03
• Electrical quality factor QES 0.52
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 561cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 7.1Ω
• Inductance (1kHz, in series, estimated) LE 4.02mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 19.6N/A
• Motor constant Bl/√RE 7.36N/√W
• Diameter 160mm

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 130g
• Moving mass (without air load) MMD 122g

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 49.6L
• Mechanical resistance RMS 10.2N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 284mm
• Mounting depth 150mm
• Volume occupied by the driver 3.4L