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Eighteensound 21NLW4000 21inch Lautsprecher Chassis 4 Ohm
ES21NLW4000-4
- 94 dB SPL 1W / 1m sensitivity
- 100 mm (4 in) Interleaved Sandwich Voice coil (ISV)
- 3200 W program power handling
- 70 mm (2,76 in) peak to peak excursion
- Single Demodulating Ring (SDR) for lower distortion
- Composite reinforced straight ribbed cone
- Optimized high grade neodymium magnet assembly
- Recommended for subwoofer usage in vented enclosures
The 21NLW4000 is a 21" (533 mm) extended low frequency loudspeaker, designed for use in vented enclosures. The loudspeaker is designed to withstand high power levels without damage while providing clean and undistorted LF reproduction at a very high SPL. For optimum results we recommend amplifiers able to deliver 3200 Watt program power. The 21NLW4000 features a unique motor featuring a high grade neodymium magnet assembly in a structure optimized for thermal and magnetic efficiency. The transducer features include a large displacement suspension system which, in conjunction with a composite reinforced, straight ribbed cone, allows an ultra-linear piston action and provides full mechanical control across the entire working range. The 100mm (4 in) state-of-the-art voice-coil utilizing Interleaved Sandwich Voice coil (ISV) technology, provides high levels of thermal stability and durability. The ISV technology achieves a balanced linear motor unit exerting an exceptionally high force factor.
| Nominal Diameter | 533 mm |
| Nominal Impedance | 4 Ohm |
| Minimum Impedance | 3,0 Ohm |
| Nominal Power Handling1 | 1600 W |
| Continuous Power Handling2 | 3200 W |
| Sensitivity3 | 94,0 dB |
| Frequency Range | 30 - 1800 Hz |
| Voice Coil Diameter | 100 mm |
| Surround Shape | Triple roll |
| Magnet Material | Neo |
| Woofer Cone Treatment | Weather protected |
| Recommended Enclosure | 200,0 dm3 |
| Recommended Tuning | 30 Hz |
| Resonance Frequency | 27 Hz |
| Re | 2,6 Ohm |
| Qes | 0,39 |
| Qms | 16,3 |
| Qts | 0,38 |
| Vas | 380,0 dm3 |
| Sd | 1660,0 cm2 |
| No | 1,9 % |
| Xmax | 15,0 mm |
| Mms | 355,0 g |
| Bl | 20,0 Txm |
| Le | 1,3 mH |
| EBP | 69 Hz |
| Overall Diameter | 545 mm |
| Bolt Circle Diameter | 520 mm |
| Baffle Cutout Diameter | 492,0 mm |
| Depth | 245 mm |
| Flange and Gasket Thickness | 18 mm |
| Net Weight | 11,6 kg |
| Shipping Weight | 13,1 kg |
| Shipping Box | 570x570x290 mm |
Herstellerinformation
| Marke | Eighteensound |
|---|---|
| Hersteller | Eighteen Sound SRL |
| info@eighteensound.it | |
| Telefon | (+39) 0522 1861800 |
| Anschrift | Via Botticelli 8 1 - Loc. Vallina, 42124 Mancasale (Reggio Emilia), Italien |
| Qts | 0.3809 |
|---|---|
| BL (Tm) | 20.0 |
| Qes | 0.39 |
| Qms | 16.3 |
| Vas (l) | 380.0 |
| Xmax (mm) | 15.0 |
| Fs (Hz) | 27 |
| Empfindlichkeit (dB) | 94.0 |
| Re (Ohm) | 2.6 |
| Sd (m²) | 0.166 |
| Mms (g) | 355 |
| Le (mH) | 1.3 |
| EBP | 69 Hz |
| Nominale Impedanz | 4 Ω |
| Flange and Gasket Thickness | 18 mm (0.71 in) |
| Frequenzbereich | 30 - 1800 Hz |
| Schwingspulendurchmesser | 100 mm (4.0 in) |
| Einbautiefe | 245 mm (9.65 in) |
| Lochkreisdurchmesser | 520 mm (20.47 in) |
| Dauerbelastbarkeit | 3200 W |
| Schallwandausschnitt | 492.0 mm (19.37 in) |
| Woofer Cone Treatment | Weather protected |
| Nominaler Durchmesser | 533 mm ( in) |
| Versandkarton | 570x570x290 mm (22.44x22.44x11.42 in) |
| Magnet | Neo |
| Recommended Enclosure | 200.0 dm3 (7.06 ft3) |
| Netto Gewicht | 11.6 kg |
| Surround Shape | Triple roll |
| ?0 | 1.9 % |
| Nominale Belastbarkeit | 1600 W |
| MInimale Impedanz | 3.0 Ω |
| Außendurchmesser | 545 mm (21.46 in) |
| Tuning Frequenz | 30 Hz |
| Versandgewicht | 13.1 kg (28.88 lb) |
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