Eighteen Sound 21NLW4000-8 LF Driver 21-inch Extended LF Neo Woofer Transducer with High Grade Neodymium Magnet Assembly 8 Ohms
- HIGHLIGHT || 94 dB SPL 1W / 1 m average sensitivity || 4-inch Interleaved Sandwich Voice coil (ISV) || 3200 W program power handling || 2.76-inch peak to peak excursion || Composite reinforced straight ribbed cone || Optimized high grade neodymium magnet assembly || Recommended for subwoofer usage in compact vented or bandpass enclosures || Nominal Diameter : 21-inch || Rated Impedance 8 Ohm || AES Power 1500W || Peak Power 7200 W || Frequency Range 30-1800Hz ||
- "HIGHLIGHT || || * Power Compression @-10dB 0.62 dB || * Power Compression @-3dB 2.18 dB || * Power Compression @@Full Power 3.57 dB || * Max Recomm. Frequency 150Hz || * Recomm. Enclosure Volume 120-300 It (4.24 - 10.60 cuft) || * Minimum Impedance 6 Ohm at 25 DegreesC || * Max Peak To Peak Excursion 70 mm (2.76 in) || * Voice Coil Diameter 100 mm (4 in) || * Voice Coil winding material Copper wire || * Suspension Triple-roll. Polycotton || * Cone Complex Composite || "
- "THIELE SMALL PARAMETERS || * Fs 29 Hz || * Re 4.9 Ohm || * Sd 0.166 sq. mt. (257.30 sq.in.) || * Qms 22.0 || * Qes 0.38 * Qts 0.37 || * Vas 305 It. (10.77 cuff) * Mms 380 gr. (0.83 lb) || * BI 30.0 Tm || * Linear Mathematical Xmax +/- 15 mm (+/- 0.59 in) * Le (1kHz) 2.80 mH * Ref. Efficiency 1W@1m (half space) 2% || "
- Overall diameter 545mm (21.46 in) || N.of mounting holes and bolt || Mounting holes diameter 8.5 mm (0.33 in) || Bolt circle diameter 520mm (20.47 in) || Front mount baffle cutout diameter 492 mm (19.37 in) || Rear mount baffle cutout diameter 490 mm (19.29 in) || Total depth 245 mm (9.64 in) || Flange and gasket thickness 18 mm (0.7 in) || Net weight 11.6 kg (25.5 Ib) * Shipping weight 13.1 Kg (28.8 lb) || CardBoard Packaging dimensions : 22.4x22.4x1 1.4 inch ||
- 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.
- HIGHLIGHT || 94 dB SPL 1W / 1 m average sensitivity || 4-inch Interleaved Sandwich Voice coil (ISV) || 3200 W program power handling || 2.76-inch peak to peak excursion || Composite reinforced straight ribbed cone || Optimized high grade neodymium magnet assembly || Recommended for subwoofer usage in compact vented or bandpass enclosures || Nominal Diameter : 21-inch || Rated Impedance 8 Ohm || AES Power 1500W || Peak Power 7200 W || Frequency Range 30-1800Hz ||
- "HIGHLIGHT || || * Power Compression @-10dB 0.62 dB || * Power Compression @-3dB 2.18 dB || * Power Compression @@Full Power 3.57 dB || * Max Recomm. Frequency 150Hz || * Recomm. Enclosure Volume 120-300 It (4.24 - 10.60 cuft) || * Minimum Impedance 6 Ohm at 25 DegreesC || * Max Peak To Peak Excursion 70 mm (2.76 in) || * Voice Coil Diameter 100 mm (4 in) || * Voice Coil winding material Copper wire || * Suspension Triple-roll. Polycotton || * Cone Complex Composite || "
- "THIELE SMALL PARAMETERS || * Fs 29 Hz || * Re 4.9 Ohm || * Sd 0.166 sq. mt. (257.30 sq.in.) || * Qms 22.0 || * Qes 0.38 * Qts 0.37 || * Vas 305 It. (10.77 cuff) * Mms 380 gr. (0.83 lb) || * BI 30.0 Tm || * Linear Mathematical Xmax +/- 15 mm (+/- 0.59 in) * Le (1kHz) 2.80 mH * Ref. Efficiency 1W@1m (half space) 2% || "
- Overall diameter 545mm (21.46 in) || N.of mounting holes and bolt || Mounting holes diameter 8.5 mm (0.33 in) || Bolt circle diameter 520mm (20.47 in) || Front mount baffle cutout diameter 492 mm (19.37 in) || Rear mount baffle cutout diameter 490 mm (19.29 in) || Total depth 245 mm (9.64 in) || Flange and gasket thickness 18 mm (0.7 in) || Net weight 11.6 kg (25.5 Ib) * Shipping weight 13.1 Kg (28.8 lb) || CardBoard Packaging dimensions : 22.4x22.4x1 1.4 inch ||
- 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.
