Cerwin Vega VPS122D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.7dB

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 5.50
• Electrical quality factor QES 0.83
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 7.9mm
• Air volume displaced at xmax VD 427cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.4Ω
• Inductance (1kHz, in series, estimated) LE 2.27mH

Magnet

• Force factor (in series) Bl 12.7N/A
• Motor constant Bl/√RE 6.89N/√W

Diaphragm

• Effective diameter 262mm
• Effective area SD 540cm²
• Moving mass MMS 167g
• Moving mass (without air load) MMD 158g

Suspensions

• Stiffness KMS 9.52N/mm
• Compliance CMS 105µm/N
• Equivalent volume to the compliance VAS 43L
• Mechanical resistance RMS 7.24N·s/m

Dimensions

• Nominal diameter 12″
• 319mm
• Overall diameter 319mm
• Baffle cutout diameter 280mm
• Mounting depth 94mm
• Volume occupied by the driver 0.93L