JL Audio 12TW3-D4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84dB

Thiele & Small parameters

• Resonance frequency (free air) fS 26.5Hz
• Mechanical quality factor QMS 10.77
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.53

Large signal parameters

• Maximum linear excursion xmax 15.2mm
• Air volume displaced at xmax VD 819cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 9.3Ω
• Inductance (1kHz, in series, estimated) LE 9.3mH

Magnet

• Force factor (in series) Bl 29.1N/A
• Motor constant Bl/√RE 9.55N/√W
• Diameter 156mm

Diaphragm

• Effective diameter 262mm
• Effective area SD 539cm²
• Moving mass MMS 307g
• Moving mass (without air load) MMD 298g

Suspensions

• Stiffness KMS 8.48N/mm
• Compliance CMS 118µm/N
• Equivalent volume to the compliance VAS 48.7L
• Mechanical resistance RMS 4.73N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 318mm
• Baffle cutout diameter 295mm
• Mounting depth 89mm
• Volume occupied by the driver 0.82L
• Net weight 6.8kg