JL Audio C7-650cw

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 54.5Hz
• Mechanical quality factor QMS 6.27
• Electrical quality factor QES 0.67
• Total quality factor QTS 0.61

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 69cm³
• Power handling P 125W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz, estimated) LE 0.47mH

Magnet

• Force factor Bl 5.31N/A
• Motor constant Bl/√RE 3.01N/√W
• Diameter 100mm

Diaphragm

• Effective diameter 133mm
• Effective area SD 138cm²
• Moving mass MMS 17.7g
• Moving mass (without air load) MMD 16.4g

Suspensions

• Stiffness KMS 2.08N/mm
• Compliance CMS 482µm/N
• Equivalent volume to the compliance VAS 13.1L
• Mechanical resistance RMS 0.97N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 183mm
• Baffle cutout diameter 141mm
• Overall depth 95mm
• Flange thickness 25mm
• Mounting depth 70mm
• Volume occupied by the driver (estimated) 0.69L