DB Drive WDX15 7KD2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 32.6Hz
• Mechanical quality factor QMS 6.70
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.39

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 5.01mH

Magnet

• Force factor (in series) Bl 30.3N/A
• Motor constant Bl/√RE 15.2N/√W

Diaphragm

• Effective diameter 310mm
• Effective area SD 755cm²
• Moving mass MMS 428g
• Moving mass (without air load) MMD 413g

Suspensions

• Stiffness KMS 19.6N/mm
• Compliance CMS 50.9µm/N
• Equivalent volume to the compliance VAS 41.2L
• Mechanical resistance RMS 13.1N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Volume occupied by the driver (estimated) 4.3L