| SPECIFICATION | Value | Unit |
|---|---|---|
| Nominal diameter | 21 | mm/inch |
| Rated impedance | 8 | ohm |
| Nominal power | 2500 | W |
| Maximum power | 5000 | W |
| Sensitivity (1w/1m) | 95.6 | dB |
| Frequency response | 29-500 | Hz |
| Voice coil diameter | 152/6 | mm/inch |
| Voice coil material | Copper | mm |
| Magnet | Ferrite | mm/inch |
| Magnet Size | 280*20mm | mm |
| Y35 MAGNET | *2PCS | |
| Carbon Fibre Cone | ||
| Inside Shorting Circuit Ring Technology |
| T/S PARAMETER | Value | Unit |
|---|---|---|
| Fs | 29 | Hz |
| Re | 5.2 | ? |
| Qes | 0.32 | |
| Qts | 0.31 | |
| Qms | 13 | |
| Vas | 278.9 | L |
| Cms | 0.07 | mm/N |
| Mms | 414.6 | gr |
| BL | 34.5 | N/A |
| Le | 1.8 | mH |
| MOUNTING INFORMATION | Value | Unit |
|---|---|---|
| Overall diameter | 568 | mm |
| Bolt Circle diameter | 552 | mm |
| Baffle Cutout diameter | 496 | mm |
| Depth | 248 | mm |
| Net weight | 25.3 | KG |
| Shipping | 62*61*36 | mm |
MODEL : HD21FC280
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