Skar Audio MA-8 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.6dB
• Frequency response 50 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 65Hz
• Mechanical quality factor QMS 5.30
• Electrical quality factor QES 0.82
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Air volume displaced at xmax VD 338cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.8Ω
• Inductance (1kHz, in series, estimated) LE 3.65mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 20N/A
• Motor constant Bl/√RE 7.67N/√W
• Diameter 160mm

Diaphragm

• Effective diameter 186mm
• Effective area SD 270cm²
• Moving mass MMS 120g
• Moving mass (without air load) MMD 117g

Suspensions

• Stiffness KMS 20N/mm
• Compliance CMS 50µm/N
• Equivalent volume to the compliance VAS 5.18L
• Mechanical resistance RMS 9.24N·s/m

Dimensions

• Nominal diameter 8″
• 203mm
• Baffle cutout diameter 188mm
• Mounting depth 145mm
• Volume occupied by the driver 2.8L