ESX Quantum QE1522

• Sensitivity (1W, 1m, infinite baffle) SPL1W 90.8dB

Thiele & Small parameters

• Resonance frequency (free air) fS 33Hz
• Mechanical quality factor QMS 5.01
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 13.3mm
• Maximum excursion before damage xlim 20mm
• Air volume displaced at xmax VD 1100cm³
• Power handling P 1000W
• Program power Pmax 2000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series) LE 2.2mH
• VC Diameter 76mm
• Winding height HVC 34.5mm

Magnet

• Force factor (in series) Bl 18.9N/A
• Motor constant Bl/√RE 9.45N/√W

Diaphragm

• Effective diameter 325mm
• Effective area SD 830cm²
• Moving mass MMS 206g
• Moving mass (without air load) MMD 189g

Suspensions

• Stiffness KMS 8.93N/mm
• Compliance CMS 112µm/N
• Equivalent volume to the compliance VAS 109L
• Mechanical resistance RMS 8.53N·s/m

Dimensions

• Nominal diameter 15″
• 380mm
• Overall diameter 394mm
• Baffle cutout diameter 354mm
• Mounting depth 182mm
• Volume occupied by the driver (estimated) 4.7L