DB Drive WDX8G0.4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.2dB

Thiele & Small parameters

• Resonance frequency (free air) fS 41.7Hz
• Mechanical quality factor QMS 2.23
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 215cm³
• 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 3.09mH
• VC Diameter 50.8mm

Magnet

• Force factor (in series) Bl 19.5N/A
• Motor constant Bl/√RE 7.47N/√W

Diaphragm

• Effective diameter 158mm
• Effective area SD 195cm²
• Moving mass MMS 93.3g
• Moving mass (without air load) MMD 91.2g
• Material Reinforced paper

Suspensions

• Stiffness KMS 6.41N/mm
• Compliance CMS 156µm/N
• Equivalent volume to the compliance VAS 8.42L
• Mechanical resistance RMS 11N·s/m

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 214mm
• Baffle cutout diameter 231mm
• Mounting depth 118mm
• Volume occupied by the driver (estimated) 0.98L