18 Sound HD1480T – Ferrite 1.4-Inch Fixed-Installation Compression Driver with Titanium-Polyester Diaphragm
The 18 Sound HD1480T 1.4-inch exit high-frequency compression driver has been designed for use in high-quality installed audio systems, where weight is not the key issue — identical positioning language to the HD2080T documented earlier in this session, confirming this is genuinely the smaller-throat sibling within the same fixed-installation-focused ferrite compression driver family. 18 Sound explicitly notes this driver is also available in a 2-inch exit version.
The HD1480T diaphragm assembly is composed of a titanium dome sandwiched to a proprietary treated polyester suspension unit. It has been designed to maintain low resonance, lowering the minimum crossover point value at 1.2 kHz — though the published specification’s own recommended crossover figure is actually 0.8 kHz, the identical marketing-text-versus-spec-sheet discrepancy pattern documented on the HD2080T, where the driver’s low-resonance engineering appears to achieve an even lower practical crossover than the descriptive text’s own stated design target.
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. Four top plate air ducts have been designed to act as a loading chamber for the diaphragm, implementing mid band distortion and response figures — matching the HD2080T’s construction philosophy exactly, at the smaller 1.4-inch throat scale.
Design and Construction of the 18 Sound HD1480T
The proprietary treated Nomex former has a 30% higher value of tensile elongation at a working operative temperature (200°C) when compared to Kapton — the identical figure documented consistently across every compression driver covered in this session’s HF range. This feature enables proper energy transfer control from the voice coil to the dome in real working conditions, and this proprietary former material is also suitable for use in higher moisture content environments.
The HD1480T powerful ceramic magnet assembly has been designed to obtain 16 kGauss in the gap — matching the HD2020’s and HD2080T’s shared flux density figure exactly, confirming this specific ferrite motor tier across 18 Sound’s standard compression driver range.
Excellent heat dissipation and thermal exchange are guaranteed by the direct contact between the magnetic structure and the diecast aluminium heatsink, which leads to a lower power compression value — a diecast heatsink construction, distinct from the simpler “aluminium cover” language documented on the HD2080T, though both describe the same fundamental direct-contact thermal path philosophy.
At 5.3 kg, 169 mm overall diameter, and 75 mm depth, the 18 Sound HD1480T matches the HD2080T’s physical footprint almost exactly (169 mm diameter, 75 mm depth on both), at a marginal 100 g additional weight — confirming both drivers share essentially the same chassis platform scaled to their respective throat diameters.
Performance and Applications for the 18 Sound HD1480T
The 18 Sound HD1480T delivers 109 dB sensitivity across a 0.5 – 20 kHz frequency range, with a recommended crossover of 0.8 kHz using a 12 dB/octave or steeper high-pass filter. The 100 W AES / 200 W continuous program power handling matches the HD2080T’s figures precisely, confirming the smaller 1.4-inch throat doesn’t compromise thermal capacity relative to the 2-inch sibling.
For fixed installations, permanent venue systems, and any application where the compression driver’s weight is a secondary consideration to acoustic performance and low crossover flexibility, the 18 Sound HD1480T brings the HD2080T’s proven titanium-polyester diaphragm engineering to a smaller 1.4-inch throat format — useful for cabinet designs and horn interfaces specifically requiring that throat geometry.
Conclusion – 18 Sound HD1480T Compression Driver
The 18 Sound HD1480T is the 1.4-inch throat sibling of the HD2080T, sharing an essentially identical titanium-polyester diaphragm, 3-slot phase plug, ferrite motor, and fixed-installation positioning. With matching 109 dB sensitivity, 200 W continuous program power handling, and a 0.8 kHz crossover recommendation, this driver delivers the same proven engineering in the smaller throat format 18 Sound also offers in a 2-inch exit version.
For installed audio systems requiring a 1.4-inch throat interface specifically, where weight is not the key issue, the 18 Sound HD1480T delivers 18 Sound’s standard ferrite compression driver technology at this throat size.
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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.
