PowerBass S-1004D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 33 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 4.85
• Electrical quality factor QES 0.57
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 9.5mm
• Air volume displaced at xmax VD 314cm³
• Power handling P 275W
• Program power Pmax 550W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 3.01mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 14.9N/A
• Motor constant Bl/√RE 5.88N/√W
• Weight 3.29kg

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 98.5g
• Moving mass (without air load) MMD 94.1g
• Material Pressed Wool / Paper

Suspensions

• Stiffness KMS 3.91N/mm
• Compliance CMS 256µm/N
• Equivalent volume to the compliance VAS 39.7L
• Mechanical resistance RMS 4.21N·s/m

Dimensions

• Nominal diameter 10″
• 254mm
• Baffle cutout diameter 230mm
• Mounting depth 132mm
• Volume occupied by the driver (estimated) 1.5L