Dayton Audio Ultimax II UMII18-22
2x2Ω
Subwoofer
| Nominal diameter | 18″ / 427 mm |
| Resonance | 22 Hz |
| Q factor | 0.53 |
| Sensitivity | 87.5 dB |
| Linear excursion | ± 28 mm |
| Program Power | 2400 W |
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Specifications
- Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB
- Frequency response 20 - 500Hz
Thiele & Small parameters
- Resonance frequency (free air) fS 22Hz
- Mechanical quality factor QMS 2.53
- Electrical quality factor QES 0.67
- Total quality factor QTS 0.53
Large signal parameters
- Maximum linear excursion (one way) xmax 28mm
- Air volume displaced at xmax VD 3315cm³
- Power handling P 1200W
- Program power Pmax 2400W
Voice Coil
- Nominal impedance Z 2 x 2Ω
- DC resistance (in series) RE 4.2Ω
- Inductance (1kHz, in series) LE 1.15mH
- VC Diameter 76mm
Magnet
- Force factor (in series) Bl 19.2N/A
- Motor constant Bl/√RE 9.37N/√W
- Material Ferrite
Diaphragm
- Effective diameter 388mm
- Effective area SD 1184cm²
- Moving mass MMS 420g
- Moving mass (without air load) MMD 393g
- Material Carbon Fiber
Suspensions
- Stiffness KMS 8.07N/mm
- Compliance CMS 124µm/N
- Equivalent volume to the compliance VAS 248L
- Mechanical resistance RMS 23N·s/m
- Surround material Rubber
Dimensions
- Nominal diameter 18″
- 427mm
- Overall diameter 427mm
- Baffle cutout diameter 220mm
- Overall depth 229mm
- Volume occupied by the driver (estimated) 6.9L
- Frame material Cast Aluminium
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Export this driver to a simulation software:
Closed Box Simulator·
Speakerbench
WinISD
Basta!
Hornresp
QSpeakers
SpeakerSim
MfbLabs
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