ESX Quantum QE822

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 42.7Hz
• Mechanical quality factor QMS 4.48
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 18mm
• Air volume displaced at xmax VD 208cm³
• Power handling P 400W
• Program power Pmax 800W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.8Ω
• Inductance (1kHz, in series) LE 2.26mH
• VC Diameter 64mm
• Winding height HVC 36mm

Magnet

• Force factor (in series) Bl 20N/A
• Motor constant Bl/√RE 10.3N/√W

Diaphragm

• Effective diameter 163mm
• Effective area SD 208cm²
• Moving mass MMS 133g
• Moving mass (without air load) MMD 131g

Suspensions

• Stiffness KMS 9.62N/mm
• Compliance CMS 104µm/N
• Equivalent volume to the compliance VAS 6.4L
• Mechanical resistance RMS 7.97N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Overall diameter 220mm
• Baffle cutout diameter 183mm
• Mounting depth 138mm
• Volume occupied by the driver (estimated) 1L