Skar Audio DDX-15 D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 35.1Hz
• Mechanical quality factor QMS 4.30
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 15mm
• Air volume displaced at xmax VD 1206cm³
• Power handling P 1000W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 8.4Ω
• Inductance (1kHz, in series, estimated) LE 7.95mH
• VC Diameter 63.5mm
• Winding material Copper

Magnet

• Force factor (in series) Bl 32.3N/A
• Motor constant Bl/√RE 11.1N/√W
• Diameter 193mm

Diaphragm

• Effective diameter 320mm
• Effective area SD 804cm²
• Moving mass MMS 281g
• Moving mass (without air load) MMD 265g
• Material Pressed Paper

Suspensions

• Stiffness KMS 19.2N/mm
• Compliance CMS 52µm/N
• Equivalent volume to the compliance VAS 47.7L
• Mechanical resistance RMS 14.4N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 15″
• 381mm
• Baffle cutout diameter 358mm
• Overall depth 224mm
• Flange thickness 29mm
• Mounting depth 195mm
• Volume occupied by the driver (estimated) 7.5L