PowerBass XL-1040D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.6dB
• Frequency response 35 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35.3Hz
• Mechanical quality factor QMS 3.70
• Electrical quality factor QES 0.62
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 8.5mm
• Air volume displaced at xmax VD 309cm³
• 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 3.86mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 18.1N/A
• Motor constant Bl/√RE 7.15N/√W
• Weight 4.65kg

Diaphragm

• Effective diameter 215mm
• Effective area SD 363cm²
• Moving mass MMS 143g
• Moving mass (without air load) MMD 138g
• Material Non Pressed Paper

Suspensions

• Stiffness KMS 7.05N/mm
• Compliance CMS 142µm/N
• Equivalent volume to the compliance VAS 26.6L
• Mechanical resistance RMS 8.58N·s/m

Dimensions

• Nominal diameter 10″
• 254mm
• Baffle cutout diameter 237mm
• Mounting depth 133mm
• Volume occupied by the driver (estimated) 1.5L