DB Drive WDX12 7KD2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85dB

Thiele & Small parameters

• Resonance frequency (free air) fS 37.5Hz
• Mechanical quality factor QMS 7.61
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.40

Large signal parameters

• Power handling P 3500W
• Program power Pmax 7000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series, estimated) LE 4.25mH

Magnet

• Force factor (in series) Bl 27.4N/A
• Motor constant Bl/√RE 13.7N/√W

Diaphragm

• Effective diameter 240mm
• Effective area SD 453cm²
• Moving mass MMS 334g
• Moving mass (without air load) MMD 327g

Suspensions

• Stiffness KMS 18.5N/mm
• Compliance CMS 53.9µm/N
• Equivalent volume to the compliance VAS 15.7L
• Mechanical resistance RMS 10.4N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Volume occupied by the driver (estimated) 2.4L