PowerBass PS-12

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.7dB
• Frequency response 32 - 450Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 32.4Hz
• Mechanical quality factor QMS 7.42
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 412cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz, estimated) LE 1.58mH
• VC Diameter 51mm

Magnet

• Force factor Bl 11.3N/A
• Motor constant Bl/√RE 6.43N/√W
• Weight 1.13kg

Diaphragm

• Effective diameter 256mm
• Effective area SD 515cm²
• Moving mass MMS 111g
• Moving mass (without air load) MMD 103g
• Material DDC coated paper cone

Suspensions

• Stiffness KMS 4.61N/mm
• Compliance CMS 217µm/N
• Equivalent volume to the compliance VAS 81.6L
• Mechanical resistance RMS 3.06N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 279mm
• Mounting depth 137mm
• Volume occupied by the driver (estimated) 2.4L