PowerBass 2XL-1204D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85dB
• Frequency response 25 - 450Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 28Hz
• Mechanical quality factor QMS 4.89
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 13mm
• Air volume displaced at xmax VD 663cm³
• Power handling P 450W
• Program power Pmax 900W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 6.8Ω
• Inductance (1kHz, in series, estimated) LE 5.87mH
• VC Diameter 64mm

Magnet

• Force factor (in series) Bl 23.8N/A
• Motor constant Bl/√RE 9.13N/√W
• Weight 7.94kg

Diaphragm

• Effective diameter 255mm
• Effective area SD 510cm²
• Moving mass MMS 245g
• Moving mass (without air load) MMD 236g
• Material IMFPM / PP Matrix

Suspensions

• Stiffness KMS 6.69N/mm
• Compliance CMS 150µm/N
• Equivalent volume to the compliance VAS 55.4L
• Mechanical resistance RMS 8.8N·s/m

Dimensions

• Nominal diameter 12″
• 305mm
• Baffle cutout diameter 280mm
• Mounting depth 167mm
• Volume occupied by the driver (estimated) 2.4L