DB Drive WDX18 5K

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 44.4Hz
• Mechanical quality factor QMS 6.96
• Electrical quality factor QES 0.93
• Total quality factor QTS 0.82

Large signal parameters

• Maximum linear excursion xmax 16.5mm
• Air volume displaced at xmax VD 1925cm³
• Power handling P 2500W
• Program power Pmax 5000W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series) LE 3mH

Magnet

• Force factor (in series) Bl 30.1N/A
• Motor constant Bl/√RE 11.9N/√W

Diaphragm

• Effective diameter 385mm
• Effective area SD 1167cm²
• Moving mass MMS 472g
• Moving mass (without air load) MMD 444g

Suspensions

• Stiffness KMS 33.3N/mm
• Compliance CMS 30µm/N
• Equivalent volume to the compliance VAS 57.9L
• Mechanical resistance RMS 18.9N·s/m

Dimensions

• Nominal diameter 18″
• 457mm
• Volume occupied by the driver (estimated) 6.9L