| 21″ SUBWOOFER | |
| FERRITE MAGNET | |
| ALUMINIUM BASKET | |
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| GENERAL SPECIFICATIONS | ||
| Nominal diameter | mm (in.) | 465(18) |
| Nominal impedance | Ω | 8 |
| Nominal(AES) | W | 1200 |
| Continuous program | W | 2400 |
| Sensitivity | dB | 98 |
| Frequency range | Hz | 32 ~ 1500 |
| Voice coil diameter | mm (in.) | 115(4.5) |
| Voice coil material | Copper outside/inside |
| SMALL SIGNAL PARAMETERS | |||
| DC resistance | Re | Ohm | 5.5 |
| Resonance frequency | Fs | Hz | 32 |
| Moving mass | Mms | g | 258.02 |
| Force factor | BL | N/A | 33 |
| Mechanical Q-factor | Qms | 7.4215 | |
| Electrical Q-factor | Qes | 0.371 | |
| Total | Q-factor | Qts | 0.35 |
| Equivalent air volume | Vas | I | 157 |
| Diaphragm area | Sd | cm² | 1257 |
