PRO Audio System 18 Inch PA Speaker Professional Audio Speaker Subwoofer
| General Specifications | ||
| Nominal Diameter | 18 | mm/inch |
| Rated Impedance | 8 | ohm |
| Nominal Power handling | 650 | Watts |
| Program Power | 1300 | Watts |
| Sensitivity(lw/lm) | 99 | dB |
| Frequency Range | 40.8-1.5K | Hz |
| Minimum Impedance(Zmin) | 5.6 | ohm |
| Voice Coil Diameter | 100/4 | mm/inch |
| Voice Coil Material | Cooper | |
| Number of layers | 2 | |
| Magnet gap depth | 12 | mm |
| Surround Shape | W-roll | |
| Basket | Cast Aluminium | |
| Magnet | 220 Ferrite | |
| Mounting Information | ||
| Overall Diameter | 468 | mm |
| Bolt Circle Diameter | 445 | mm |
| Baffle Cutout Diameter | 424 | mm |
| Overall Depth | 212 | mm |
| Net Weight | 12.9 | kg |
| Shipping weight | 14.1 | kg |
| Shipping Box | 490*490*250 | mm |
| Thiele-Small Parameters | |||
| Resonance frequency | Fs | 40.8 | Hz |
| DC resistance | Re | 5.6 | ohm |
| Mechanical factor | Qms | 5.93 | |
| Electrical factor | Qes | 0.56 | |
| Total factor | Qts | 0.51 | |
| Mechanical compliance | Cms | 0.09 | mm/N |
| Mechanical resistance | Rms | 7.2 | mech-ohm |
| of suspension losses | |||
| Effective Moving Mass | Mms | 167.5 | gr |
| Half-space efficiency | Eff | 2.13 | % |
| BL Factor | BL | 20.7 | T.m |
| Equivalent Cas air load | Vas | 181.8 | liters |
| Voice-coil inductance | LelK | 37 | mH |
