PowerBass S-1004

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.6dB
• Frequency response 33 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33.5Hz
• Mechanical quality factor QMS 5.12
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 297cm³
• Power handling P 275W
• Program power Pmax 550W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 1.44mH
• VC Diameter 51mm

Magnet

• Force factor Bl 11.6N/A
• Motor constant Bl/√RE 6.48N/√W
• Weight 3.29kg

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 92.4g
• Moving mass (without air load) MMD 88g
• Material Pressed Wool / Paper

Suspensions

• Stiffness KMS 3.7N/mm
• Compliance CMS 270µm/N
• Equivalent volume to the compliance VAS 43.8L
• Mechanical resistance RMS 3.8N·s/m

Dimensions

• Nominal diameter 10″
• 254mm
• Baffle cutout diameter 230mm
• Mounting depth 133mm
• Volume occupied by the driver (estimated) 1.5L