Cerwin Vega VPRO122D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 30.5Hz
• Mechanical quality factor QMS 13.30
• Electrical quality factor QES 0.60
• Total quality factor QTS 0.57

Large signal parameters

• Maximum linear excursion xmax 18.5mm
• Air volume displaced at xmax VD 907cm³
• Power handling P 750W
• Program power Pmax 1500W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.7Ω
• Inductance (1kHz, in series, estimated) LE 2.95mH

Magnet

• Force factor (in series) Bl 16N/A
• Motor constant Bl/√RE 8.32N/√W
• Diameter 165mm

Diaphragm

• Effective diameter 250mm
• Effective area SD 490cm²
• Moving mass MMS 218g
• Moving mass (without air load) MMD 210g

Suspensions

• Stiffness KMS 8N/mm
• Compliance CMS 125µm/N
• Equivalent volume to the compliance VAS 42.5L
• Mechanical resistance RMS 3.14N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 320mm
• Baffle cutout diameter 272mm
• Mounting depth 152mm
• Volume occupied by the driver 2.29L