PowerBass L-1004D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.5dB
• Frequency response 33 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 4.40
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.39

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 363cm³
• Power handling P 350W
• Program power Pmax 700W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 3.38mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 18.2N/A
• Motor constant Bl/√RE 7.19N/√W
• Weight 4.65kg

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 117g
• Moving mass (without air load) MMD 113g
• Material Injection molded Polypropylene

Suspensions

• Stiffness KMS 4.79N/mm
• Compliance CMS 209µm/N
• Equivalent volume to the compliance VAS 32.3L
• Mechanical resistance RMS 5.53N·s/m

Dimensions

• Nominal diameter 10″
• 254mm
• Baffle cutout diameter 230mm
• Mounting depth 130mm
• Volume occupied by the driver (estimated) 1.5L