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18 Sound NSD1480N
Art.Nr.: 18SNSD1480N
18-Sound NSD1480N HF Neodymium Treiber
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Eighteensound
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18 Sound NSD1480N
SMALL SPECIFICATIONS
111 dB 1W / 1m average sensitivity 1,4 inch exit throat 3 inch voice coil diameter 200 W continuous program power handling Titanium Nitride Coating Dome True Piston Motion (TPM) Technology Powerfully Neodymium magnetic structure Excellent thermal exchange
The NSD1480N has been designed for top quality sound systems application. With a 1.4-inch throat diameter, it has been developed to match the XT1464 Constant Directivity Horn.
A further innovation in the NSD1480N, when compared to excellent performances of the ND1480, is a new titanium material treatment that was found after extensive research by Eighteen Sound.
The special titanium nitride coated dome dramatically improves stiffness with obvious benefits in transient and intermodulation distortion response. With its very high value of elasticity modulus, (six times higher than titanium and two times higher than beryllium), this nitride thin film is capable of doubling the titanium stiffness.
The piston frequency range motion extends frequency by 25%, showing a predictable, ideal frequency response decay and avoiding top-end spurious resonances. The nitride-free ellipsoidal suspension shape has been designed to maintain constant titanium stiffness, assuring a 3rd harmonic distortion lower than 0.05% over the whole working frequency range.
The titanium diaphragm is produced in-house and has been developed to assure unmatched transient response. The diaphragm assembly is made joining the former directly to the titanium dome on its upper bend edge. In comparison with a usual straight former joint, the driver design assures extended frequency energy transfer for improved response linearity and unparallel reliability. This feature allows proper motion control of the dome in real working conditions. A proprietary treated Nomex former is used as Nomex shows a 30% higher value of tensile elongation at a working operative temperature (200°C) when compared to Kapton. Moreover, this proprietary former material is also suitable for use in higher moisture content environments.
The NSD1480N’s powerful neodymium magnet assembly has been designed to obtain 22KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent phase plug with 3 circumferential slots and copper ring on the pole piece, reduces inductance effect and distortion. Four top plate air ducts have been designed to act as a loading chamber for the diaphragm, implementing mid band distortion and response figures.
The custom designed O-ring creates a tight seal between the plate and the cover assuring air chamber loading. Excellent heat dissipation and thermal exchange are guaranteed by the direct contact between the magnetic structure and the aluminum cover which gives a lower power compression value. Finally, a special treatment is applied to the magnet and the top and back plates of the magnetic structure making the driver more resistant to the corrosive effects of salts and oxidization.
SMALL SPECIFICATIONS
| GENERAL SPECIFICATIONS | |
| Throat Diameter | 35,5 mm (1,4 in) |
| Rated Impedance | 8 ohm |
| DC Resistance | 6,2 ohm |
| Minimum Impedance | 8 ohm at 3500 Hz |
| Le (at 1kHz) | 124 µH |
| Power handling | (800 ÷ 20000 Hz) |
| Continuous Pink Noise (1) | 100 W above 1,2 kHz |
| Continuous Program (2) | 200 W above 1,2 kHz |
| Sensitivity(1W@1m) (3) | 111 dB |
| Frequency Range | 500 Hz ÷ 20 kHz |
| Recomm. Xover Frequency | above 800 Hz (12 dB/octave) |
| Diaphragm Material | Treated Titanium |
| Voice Coil Diameter | 74,4 mm (2,93 in) |
| Voice Coil Winding Material | Edge-wound aluminum |
| Magnet Material | Neodymium |
| Flux Density | 2,2 T |
| BL Factor | 15,5 N/A |
| Polarity | Positive voltage on red terminal gives positive pressure in the throat |
| MOUNTING INFORMATIONS | |
| Overall diameter | 131 mm (5,1 in) |
| Mounting holes diameter | 4 M6 holes 90° at Ø102 mm (4 in) |
| Bolt circle diameter | 102mm (4 in) |
| Total depth | 62 mm (2,5 in) |
| Net weight | 3,1 Kg (6,98 lb) |
| Shipping weight | 3,3 Kg (7,25 lb) |
| CardBoard Packaging dimensions | 132x132x68 mm (5,2x5,2x2,7 in) |
The NSD1480N has been designed for top quality sound systems application. With a 1.4-inch throat diameter, it has been developed to match the XT1464 Constant Directivity Horn.
A further innovation in the NSD1480N, when compared to excellent performances of the ND1480, is a new titanium material treatment that was found after extensive research by Eighteen Sound.
The special titanium nitride coated dome dramatically improves stiffness with obvious benefits in transient and intermodulation distortion response. With its very high value of elasticity modulus, (six times higher than titanium and two times higher than beryllium), this nitride thin film is capable of doubling the titanium stiffness.
The piston frequency range motion extends frequency by 25%, showing a predictable, ideal frequency response decay and avoiding top-end spurious resonances. The nitride-free ellipsoidal suspension shape has been designed to maintain constant titanium stiffness, assuring a 3rd harmonic distortion lower than 0.05% over the whole working frequency range.
The titanium diaphragm is produced in-house and has been developed to assure unmatched transient response. The diaphragm assembly is made joining the former directly to the titanium dome on its upper bend edge. In comparison with a usual straight former joint, the driver design assures extended frequency energy transfer for improved response linearity and unparallel reliability. This feature allows proper motion control of the dome in real working conditions. A proprietary treated Nomex former is used as Nomex shows a 30% higher value of tensile elongation at a working operative temperature (200°C) when compared to Kapton. Moreover, this proprietary former material is also suitable for use in higher moisture content environments.
The NSD1480N’s powerful neodymium magnet assembly has been designed to obtain 22KGauss in the gap for major benefits in transient response. The motor structure, throughout the precisely coherent phase plug with 3 circumferential slots and copper ring on the pole piece, reduces inductance effect and distortion. Four top plate air ducts have been designed to act as a loading chamber for the diaphragm, implementing mid band distortion and response figures.
The custom designed O-ring creates a tight seal between the plate and the cover assuring air chamber loading. Excellent heat dissipation and thermal exchange are guaranteed by the direct contact between the magnetic structure and the aluminum cover which gives a lower power compression value. Finally, a special treatment is applied to the magnet and the top and back plates of the magnetic structure making the driver more resistant to the corrosive effects of salts and oxidization.
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