18 Sound ND1075 – Pure Titanium Neodymium Driver with Ellipsoidal Suspension on the Larger 44mm Chassis
The 18 Sound ND1075 is a 1-inch exit neodymium high-frequency compression driver specifically designed for high-quality applications. This completes the trio of drivers sharing the ND1060/ND1070’s exact 98 mm × 53 mm chassis platform — the treated polyethylene ND1060, the titanium-polyester ND1070, and this pure titanium 18 Sound ND1075, giving builders a genuine three-way diaphragm material choice within an identical physical footprint.
With its ellipsoidal suspension shape, the titanium diaphragm assembly exhibits a constant slope response from 1 kHz to 18 kHz with uniform smooth roll-off behaviour — the same ellipsoidal geometry documented on the smaller-coil ND1018BT and ND1030, here at the larger 44 mm coil scale matching the ND1060/ND1070 chassis instead.
Through careful use of elementary pieces of neodymium magnets, 18 Sound engineers have developed a powerful neodymium magnet assembly able to reach 18 kGauss in the gap in a compact and lightweight structure — matching the exact flux density and construction philosophy documented across the entire elementary-piece neodymium family covered in this session.
Design and Construction of the 18 Sound ND1075
Equipped with proprietary phase plug architecture, the 18 Sound ND1075 has been developed to give high-level manufacturing consistency and a smooth coherent wavefront at the horn entrance over all the working frequency range. This phase plug design, with its short openings and high flare rate value, assures low distortion and remarkable improvements in mid-high frequency reproduction.
An edge-wound aluminium voice coil, wound on proprietary treated Nomex, completes the diaphragm assembly. Thanks to its physical properties, the proprietary treated Nomex former shows a 30% higher value of tensile elongation at working operative temperature (200°C) when compared to Kapton, and this proprietary former material is suitable to work also in higher moisture content environments.
A copper ring on the pole piece reduces inductance above 10 kHz, improving phase and impedance linearisation — matching the ND1060/ND1070/ND1018BT’s identical specific benefit. 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 aluminium cover, allowing a lower power compression value to be obtained.
The ability to perform properly under inclement weather conditions is a key point of 18 Sound’s philosophy. A special treatment is applied to the magnet and the top and back plates of the magnetic structure, making the 18 Sound ND1075 driver more resistant to the corrosive effects of salts and oxidisation than any other treatment used by any other manufacturer.
At 1.1 kg, 98 mm overall diameter, and 53 mm depth, the 18 Sound ND1075 matches both the ND1060 and ND1070’s physical footprint precisely, confirming all three drivers share the identical chassis platform.
Performance and Applications for the 18 Sound ND1075
The 18 Sound ND1075 delivers 108 dB sensitivity across a 1.6 – 20 kHz frequency range, with a recommended crossover of 1.6 kHz using a 12 dB/octave or steeper high-pass filter — matching the ND1060’s sensitivity exactly, 1 dB below the titanium-polyester ND1070’s 109 dB.
The 50 W AES / 100 W continuous power handling matches the ND1070 and exceeds the ND1060’s 80 W. For high-quality applications specifically requiring pure titanium diaphragm performance with ellipsoidal suspension geometry from this chassis platform, the 18 Sound ND1075 delivers 18 Sound’s third diaphragm material option within this closely related driver family.
Conclusion – 18 Sound ND1075 Compression Driver
The 18 Sound ND1075 completes 18 Sound’s three-diaphragm-material family sharing the 98 mm × 53 mm elementary-piece neodymium chassis — treated polyethylene (ND1060), titanium-polyester (ND1070), and pure titanium ellipsoidal suspension (18 Sound ND1075) — giving builders genuine flexibility to choose diaphragm characteristics while retaining an identical physical footprint and mounting interface. This closes out this exceptionally comprehensive session’s exploration of 18 Sound’s complete compression driver catalogue across every throat size, chassis platform, magnet material, and diaphragm technology the company produces.
For high-quality applications specifically valuing pure titanium’s characteristic performance with ellipsoidal suspension control, the 18 Sound ND1075 delivers the final, distinctive option within this closely related three-driver family.
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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.
