PowerBass M-1004D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.2dB
• Frequency response 35 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 4.20
• Electrical quality factor QES 0.47
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 9.2mm
• Air volume displaced at xmax VD 304cm³
• Power handling P 325W
• Program power Pmax 650W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.4Ω
• Inductance (1kHz, in series, estimated) LE 3.24mH
• VC Diameter 51mm

Magnet

• Force factor (in series) Bl 18.7N/A
• Motor constant Bl/√RE 7.4N/√W
• Weight 4.65kg

Diaphragm

• Effective diameter 205mm
• Effective area SD 330cm²
• Moving mass MMS 110g
• Moving mass (without air load) MMD 106g
• Material Non Pressed Paper

Suspensions

• Stiffness KMS 5.33N/mm
• Compliance CMS 188µm/N
• Equivalent volume to the compliance VAS 29L
• Mechanical resistance RMS 5.76N·s/m

Dimensions

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