| WF SERIES | W4-639SC |
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| DIAPHRAGM MTL | Kevlar fiber | ||||
| SURROUND MTL | Rubber | ||||
| NOMINAL IMPEDANCE | 8 W | ||||
| DCR IMPEDANCE | 6 W | ||||
| SENSITIVITY 1W/1m | 85 dB | ||||
| FREQUENCY RESPONSE | 70-7K Hz | ||||
| FREE AIR RESONANCE | 70 Hz | ||||
| VOICE COIL DIAMETER | 25 mm | ||||
| AIR GAP HEIGHT | 5 mm | ||||
| RATED POWER INPUT | 25 W | ||||
| MAXIMUM POWER INPUT | 50 W | ||||
| FORCE FACTOR, BL | 5.02 TM | ||||
| MAGNET WEIGHT (10.8oz) | 305 g | ||||
| MOVING MASS | 5.91 g | ||||
| FERRO FLUID ENHANCED | No | ||||
| SUSPENSION COMPL. | 814MN-1 | ||||
| EFFEC.PISTON AREA | 0.0057M2 | ||||
| Levc | 0.54mH | ||||
| Zo | 30.6ohm | ||||
| X-max | 3.2 mm | ||||
| Vas | 3.75 Litr. | ||||
| Qts | 0.52 | ||||
| Qms | 2.63 | ||||
| Qes | 0.64 | ||||
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