Dayton Audio Ultimax II UMII10-22

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.1dB
• Frequency response 25 - 500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 39Hz
• Mechanical quality factor QMS 2.67
• Electrical quality factor QES 0.73
• Total quality factor QTS 0.57

Large signal parameters

• Maximum linear excursion xmax 20mm
• Air volume displaced at xmax VD 690cm³
• Power handling P 600W
• Program power Pmax 1200W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 4.0Ω
• Inductance (1kHz, in series) LE 0.74mH
• VC Diameter 63.5mm

Magnet

• Force factor (in series) Bl 13.4N/A
• Motor constant Bl/√RE 6.7N/√W
• Material Ferrite

Diaphragm

• Effective diameter 210mm
• Effective area SD 345cm²
• Moving mass MMS 134g
• Moving mass (without air load) MMD 130g
• Material Carbon Fiber

Suspensions

• Stiffness KMS 7.94N/mm
• Compliance CMS 126µm/N
• Equivalent volume to the compliance VAS 21.2L
• Mechanical resistance RMS 12.3N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 237mm
• Overall diameter 237mm
• Baffle cutout diameter 180mm
• Overall depth 164mm
• Volume occupied by the driver (estimated) 2L
• Frame material Cast Aluminium