PowerBass 4XL-151D

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 30 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 3.60
• Electrical quality factor QES 0.38
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 28mm
• Air volume displaced at xmax VD 2394cm³
• Power handling P 3500W
• Program power Pmax 7000W

Voice Coil

• Nominal impedance Z 2 x 1Ω
• DC resistance (in series) RE 1.4Ω
• Inductance (1kHz, in series, estimated) LE 2.24mH
• VC Diameter 102mm

Magnet

• Force factor (in series) Bl 22.2N/A
• Motor constant Bl/√RE 18.8N/√W
• Weight 18.14kg

Diaphragm

• Effective diameter 330mm
• Effective area SD 855cm²
• Moving mass MMS 620g
• Moving mass (without air load) MMD 603g
• Material Non Press Pulp Paper Cone

Suspensions

• Stiffness KMS 29.7N/mm
• Compliance CMS 33.7µm/N
• Equivalent volume to the compliance VAS 35L
• Mechanical resistance RMS 37.8N·s/m

Dimensions

• Nominal diameter 15″
• 381mm
• Baffle cutout diameter 360mm
• Mounting depth 286mm
• Volume occupied by the driver (estimated) 4.3L