Eighteensound 21NTLW5000 - 21 Zoll Subwoofer - 4 Ohm
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| Nominal Diameter | 533 mm (21 in) |
| Rated Impedance | 4 Ohm |
| AES Power | 1800 W |
| Program Power | 4000 W |
| Sensitivity | 97 dB |
| Frequency Range | 30-1800Hz |
| Max Recomm. Frequency | 150 Hz |
| Recomm. Enclosure Volume | 120 ÷ 250 lt. (4.24 ÷ 8.83 cu.ft) |
| Fs | 31 Hz |
| Re | 5,3 Ohm |
| Sd | 0.1662 sq.m (257.61 sq.in) |
| Qms | 5.20 |
| Qes | 0.38 |
| Qts | 0.36 |
| Vas | 270 lt. (9.54 cu.ft) |
| Mms | 372 gr. (0.82 lb) |
| BL | 32 Tm |
| Linear Mathematical Xmax | ±17.5 mm (±0.69 in) |
| Le (1kHz) | 1.60 mH |
| Ref. Efficiency 1W@1m (half space) | 2.1 % |
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