ESX Quantum QE622

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 50.4Hz
• Mechanical quality factor QMS 5.21
• Electrical quality factor QES 0.47
• Total quality factor QTS 0.43

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 15mm
• Air volume displaced at xmax VD 144cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.8Ω
• Inductance (1kHz, in series) LE 1.93mH
• VC Diameter 50mm
• Winding height HVC 30mm

Magnet

• Force factor (in series) Bl 15.3N/A
• Motor constant Bl/√RE 7.85N/√W

Diaphragm

• Effective diameter 135mm
• Effective area SD 144cm²
• Moving mass MMS 91.5g
• Moving mass (without air load) MMD 90.2g

Suspensions

• Stiffness KMS 9.17N/mm
• Compliance CMS 109µm/N
• Equivalent volume to the compliance VAS 3.2L
• Mechanical resistance RMS 5.56N·s/m

Dimensions

• Nominal diameter 6.5″
• 165mm
• Overall diameter 179mm
• Baffle cutout diameter 150mm
• Mounting depth 117mm
• Volume occupied by the driver (estimated) 0.62L