Cerwin Vega V122D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 26.7Hz
• Mechanical quality factor QMS 11.40
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.64

Large signal parameters

• Maximum linear excursion xmax 17mm
• Air volume displaced at xmax VD 833cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series, estimated) LE 2.82mH

Magnet

• Force factor (in series) Bl 13.1N/A
• Motor constant Bl/√RE 6.55N/√W
• Diameter 166mm

Diaphragm

• Effective diameter 250mm
• Effective area SD 490cm²
• Moving mass MMS 180g
• Moving mass (without air load) MMD 172g

Suspensions

• Stiffness KMS 5.08N/mm
• Compliance CMS 197µm/N
• Equivalent volume to the compliance VAS 67L
• Mechanical resistance RMS 2.65N·s/m

Dimensions

• Nominal diameter 12″
• 320mm
• Overall diameter 320mm
• Baffle cutout diameter 272mm
• Mounting depth 144mm
• Volume occupied by the driver (estimated) 2.7L