PowerBass S-12T

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.9dB
• Frequency response 31 - 350Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34Hz
• Mechanical quality factor QMS 3.80
• Electrical quality factor QES 0.76
• Total quality factor QTS 0.63

Large signal parameters

• Maximum linear excursion xmax 6.8mm
• Air volume displaced at xmax VD 361cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 2.3mH
• VC Diameter 51mm

Magnet

• Force factor Bl 13N/A
• Motor constant Bl/√RE 7.29N/√W
• Weight 3.97kg

Diaphragm

• Effective diameter 260mm
• Effective area SD 531cm²
• Moving mass MMS 186g
• Moving mass (without air load) MMD 178g
• Material Injection Polypropylene

Suspensions

• Stiffness KMS 8.72N/mm
• Compliance CMS 115µm/N
• Equivalent volume to the compliance VAS 45.9L
• Mechanical resistance RMS 10.5N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 278mm
• Mounting depth 83mm
• Volume occupied by the driver (estimated) 2.4L