Dayton Audio Ultimax UM10-22

• Sensitivity (1W, 1m, infinite baffle) SPL1W 80.4dB
• Frequency response 20 - 800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 31.9Hz
• Mechanical quality factor QMS 3.02
• Electrical quality factor QES 0.94
• Total quality factor QTS 0.72

Large signal parameters

• Maximum linear excursion xmax 19mm
• Air volume displaced at xmax VD 623cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 2 x 2Ω
• DC resistance (in series) RE 3.7Ω
• Inductance (1kHz, in series) LE 0.77mH
• VC Diameter 63.5mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor (in series) Bl 12.3N/A
• Motor constant Bl/√RE 6.39N/√W
• Material Ferrite

Diaphragm

• Effective diameter 204mm
• Effective area SD 328cm²
• Moving mass MMS 192g
• Moving mass (without air load) MMD 187g
• Material Nomex

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 19.6L
• Mechanical resistance RMS 12.7N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 274mm
• Overall diameter 274mm
• Baffle cutout diameter 241mm
• Overall depth 145mm
• Volume occupied by the driver (estimated) 2.1L
• Frame material Cast Aluminium