Cerwin Vega ST154D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89dB

Thiele & Small parameters

• Resonance frequency (free air) fS 24.8Hz
• Mechanical quality factor QMS 2.80
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.30

Large signal parameters

• Maximum linear excursion xmax 16.4mm
• Air volume displaced at xmax VD 1328cm³
• Power handling P 1200W
• Program power Pmax 2400W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.5Ω
• Inductance (1kHz, in series, estimated) LE 6.57mH

Magnet

• Force factor (in series) Bl 30.4N/A
• Motor constant Bl/√RE 11.9N/√W
• Diameter 215mm

Diaphragm

• Effective diameter 321mm
• Effective area SD 810cm²
• Moving mass MMS 310g
• Moving mass (without air load) MMD 294g

Suspensions

• Stiffness KMS 7.52N/mm
• Compliance CMS 133µm/N
• Equivalent volume to the compliance VAS 123L
• Mechanical resistance RMS 17.3N·s/m

Dimensions

• Nominal diameter 15″
• 390mm
• Overall diameter 390mm
• Baffle cutout diameter 357mm
• Mounting depth 241mm
• Volume occupied by the driver 5.4L