Dayton Audio Ultimax II UMII8-22
2x2Ω
Subwoofer
Nominal diameter | 8″ / 185 mm |
Resonance | 46 Hz |
Q factor | 0.75 |
Sensitivity | 81.3 dB |
Linear excursion | ± 18 mm |
Program Power | 800 W |
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- Sensitivity (1W, 1m, infinite baffle) SPL1W 81.3dB
- Frequency response 30 - 600Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 46Hz
- Mechanical quality factor QMS 3.10
- Electrical quality factor QES 0.99
- Total quality factor QTS 0.75
Large signal parameters
- Maximum linear excursion xmax 18mm
- Air volume displaced at xmax VD 360cm³
- Power handling P 400W
- Program power Pmax 800W
Voice Coil
- Nominal impedance Z 2 x 2Ω
- DC resistance (in series) RE 3.9Ω
- Inductance (1kHz, in series) LE 0.75mH
- VC Diameter 63.5mm
Magnet
- Force factor (in series) Bl 9.7N/A
- Motor constant Bl/√RE 4.91N/√W
- Material Ferrite
Diaphragm
- Effective diameter 160mm
- Effective area SD 200cm²
- Moving mass MMS 82g
- Moving mass (without air load) MMD 80.1g
- Material Carbon Fiber
Suspensions
- Stiffness KMS 6.76N/mm
- Compliance CMS 148µm/N
- Equivalent volume to the compliance VAS 8.4L
- Mechanical resistance RMS 7.65N·s/m
- Surround material Rubber
Dimensions
- Nominal diameter 8″
- 185mm
- Overall diameter 185mm
- Baffle cutout diameter 145mm
- Overall depth 144mm
- Volume occupied by the driver (estimated) 1.2L
- Frame material Cast Aluminium
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