PowerBass M-1004

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.8dB
• Frequency response 35 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 4.05
• Electrical quality factor QES 0.42
• Total quality factor QTS 0.38

Large signal parameters

• Maximum linear excursion xmax 9mm
• Air volume displaced at xmax VD 297cm³
• Power handling P 325W
• Program power Pmax 650W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz, estimated) LE 0.74mH
• VC Diameter 51mm

Magnet

• Force factor Bl 13.1N/A
• Motor constant Bl/√RE 7.32N/√W
• Weight 4.65kg

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 102g
• Moving mass (without air load) MMD 97.8g
• Material Non Pressed Paper

Suspensions

• Stiffness KMS 5.04N/mm
• Compliance CMS 199µm/N
• Equivalent volume to the compliance VAS 30.8L
• Mechanical resistance RMS 5.55N·s/m

Dimensions

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