Skar Audio IX-8 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 82.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 48.9Hz
• Mechanical quality factor QMS 4.29
• Electrical quality factor QES 0.75
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 141cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.0Ω
• Inductance (1kHz, in series, estimated) LE 2.42mH
• VC Diameter 50.8mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 13.8N/A
• Motor constant Bl/√RE 5.63N/√W
• Diameter 119mm

Diaphragm

• Effective diameter 160mm
• Effective area SD 201cm²
• Moving mass MMS 77.9g
• Moving mass (without air load) MMD 75.7g
• Material Pressed Paper

Suspensions

• Stiffness KMS 7.35N/mm
• Compliance CMS 136µm/N
• Equivalent volume to the compliance VAS 7.8L
• Mechanical resistance RMS 5.58N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 8″
• 214mm
• Overall diameter 214mm
• Baffle cutout diameter 187mm
• Overall depth 127mm
• Flange thickness 19mm
• Mounting depth 108mm
• Volume occupied by the driver (estimated) 1.2L