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portable speaker/USB speaker (W157520)
| Nominal Diameter | 380/15 | mm/inch | |
| Rated impedance | 8 | ohm | |
| Power handing capacity | 400 | watts | |
| Sensitivity | 99 | dB | |
| Frequency Range | Fs-2000 | Hz | |
| Voice Coil Diameter | 75/3 | mm/inch | |
| Voice Coil Material | copper | ||
| Number of layer | 2 | ||
| Kind of layer | outside/inside | ||
| Resonance frequency | Fs | 53 | Hz |
| Dc resistance | Re | 5.6 | ohm |
| Mechanical factor | Qms | 15.8 | |
| Electrical factor | Qes | 0.43 | |
| Total factor | Qts | 0.42 | |
| BL factor | BL | 17 | T.M |
| Effective Moving mass | Mms | 67 | g |
| Effective Cas air load | Vas | 140 | liters |
| Effective piston area | Sd | 0.087 | m^2 |
| Overall Diameter | 390/15.4 | mm/inch | |
| Bolt Circle Diameter | 370/14.6 | mm/inch | |
| Bolt Hole Diameter | 8-F7/8-F0.28 | mm/inch | |
| Mount Baffle Cut-out | 354/14 | mm/inch | |
| Depth | 165/6.5 | mm/inch | |
| Net Weight | 7.5 | kg | |
| Shipping Weight | 8.5 | kg | |
| Package Size | 430X410X210/1PCS | mm |