18 Sound ND1424BT – Featherweight Neodymium 1.4-Inch Driver with Elementary-Piece Magnetic Architecture
The 18 Sound ND1424BT 1.4-inch exit neodymium high-frequency compression driver has been designed for high-level sound systems applications — the direct neodymium counterpart to the ferrite HD2000 documented earlier in this session, sharing the identical 3P proprietary phase plug and bent-edge titanium diaphragm construction, but built around the same “elementary pieces” neodymium magnetic architecture documented on the ND2060.
The titanium diaphragm is produced in-house and has been developed to assure unmatched transient response. A proprietary treated Nomex bended former, edge-wound aluminium 60 mm voice coil, completes the diaphragm assembly — joining the proprietary treated Nomex former directly to the titanium dome through its upper bend edge, the identical construction philosophy documented consistently across 18 Sound’s HF range.
Another big innovation in the ND1424BT consists in the magnetic complex architecture. Through careful use of elementary pieces of neodymium magnets, 18 Sound engineers have developed a powerful neodymium magnet assembly able to reach 19 kGauss in the gap in a compact and lightweight structure — matching the ND2060’s exact flux density and construction philosophy, here scaled to the smaller 1.4-inch throat.
At 1.6 kg, the 18 Sound ND1424BT is, by a genuine margin, the lightest compression driver documented across this entire session’s HF coverage — half the weight of the ferrite HD2000 (2.8 kg) it directly parallels, and lighter than every other compression driver of any throat size covered.
Design and Construction of the 18 Sound ND1424BT
Equipped with Proprietary Phase Plug 3P architecture, the 18 Sound ND1424BT has been designed to give a smooth coherent wavefront at the horn entrance across all working frequency ranges with a high level of manufacturing consistency. The phase plug’s short openings and high flare rate value assure low distortion and remarkable improvements in mid-high frequency reproduction.
The motor structure, through the precisely coherent phase plug with 3 circumferential slots and copper ring on the pole piece, reduces inductance effects and distortion. The custom designed O-ring creates a tight seal between the plate and the cover, assuring air chamber loading — the same construction detail documented on the ND2060/ND2080 family.
Excellent heat dissipation and thermal exchange are guaranteed by the direct contact between the magnetic structure and the aluminium cover, allowing a lower power compression value to be obtained.
At 1.6 kg, 116 mm overall diameter, and 54 mm depth, the 18 Sound ND1424BT is dramatically more compact than the ferrite HD2000 (2.8 kg, 145 mm diameter, 65 mm depth) — the elementary-piece neodymium architecture’s efficiency advantage is genuinely transformative at this throat scale.
Performance and Applications for the 18 Sound ND1424BT
The 18 Sound ND1424BT delivers 109 dB sensitivity across a 0.8 – 20 kHz frequency range, with a recommended crossover of 1.2 kHz using a 12 dB/octave or steeper high-pass filter — 1 dB above the HD2000’s 108 dB, from a package 1.2 kg lighter.
The 70 W AES / 140 W continuous power handling matches the HD2000 precisely, confirming the neodymium platform delivers equivalent thermal capacity from a substantially smaller and lighter structure.
Available in both 8 and 16 Ω, the 18 Sound ND1424BT provides system design flexibility for single-driver and multi-driver applications. For touring systems, portable PA, and any application where compression driver weight genuinely matters, the 18 Sound ND1424BT delivers the HD2000’s proven acoustic performance from what is, across this entire session’s HF coverage, the lightest available compression driver package.
Conclusion – 18 Sound ND1424BT Compression Driver
The 18 Sound ND1424BT is the neodymium evolution of the HD2000, matching that driver’s sensitivity and power handling from a chassis that weighs nearly half as much — 1.6 kg, the lightest compression driver documented anywhere across this session’s comprehensive HF coverage. The elementary-piece neodymium magnetic architecture delivers this weight advantage without sacrificing any of the HD2000’s proven titanium diaphragm and 3P phase plug engineering.
For portable, touring, and weight-critical applications where every gram matters, the 18 Sound ND1424BT delivers 18 Sound’s lightest available compression driver solution.
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About 18 Sound
18 Sound products are proudly made in Reggio Emilia, Italy, combining advanced technology with Italian craftsmanship. Known for their high-performance professional audio components, 18 Sound is a trusted name in the global audio industry. Their state-of-the-art manufacturing and strict quality control ensure exceptional reliability and sound clarity. 18 Sound products are designed to meet the demands of speaker builders and audio professionals, 18 Sound offers premium products with outstanding value and performance worldwide.
