18 Sound ND2080A – Highest-Sensitivity 2-Inch Driver with Copper Sleeve and 22 kGauss Ring Magnet
The 18 Sound ND2080A is the aluminium-PEN diaphragm variant sharing the ND2080’s 22 kGauss ring magnet structure — and at 111 dB, it delivers the highest sensitivity of any 2-inch compression driver documented across this entire session, 1 dB above both the titanium ND2080 and the aluminium-PEN ND2060A.
The aluminium-PEN diaphragm is produced in-house and has been developed to assure unmatched transient response, with the bent-edge former joint construction documented consistently across 18 Sound’s HF range — extended frequency energy transfer for improved response linearity and unparalleled reliability, maintaining proper motion control of the dome in real working conditions. The proprietary treated Nomex former carries the same 30% higher tensile elongation figure versus Kapton documented throughout this session’s HF coverage.
A copper sleeve for flat impedance response is the specific motor refinement distinguishing the 18 Sound ND2080A from the ND2060A’s copper ring — a different electromagnetic geometry approach, here paired with the stronger 22 kGauss ring magnet to deliver this driver’s sensitivity-leading performance.
Design and Construction of the 18 Sound ND2080A
The powerful neodymium ring magnet assembly reaches 22 kGauss in the gap for major benefits in transient response — matching the titanium ND2080’s flux density exactly. The motor structure, through the precisely coherent phase plug with 3 circumferential slots, is refined here with a copper sleeve rather than a copper ring for flat impedance response — this sleeve geometry provides distributed inductance reduction along the pole piece rather than a single ring’s more localised effect.
Four top plate air ducts act as a loading chamber for the diaphragm, and a custom-designed O-ring creates a tight seal between the plate and the cover, assuring air chamber loading — matching the construction documented across the entire ND2060/ND2080 family.
Excellent heat dissipation and thermal exchange are guaranteed by the direct contact between the magnetic structure and the aluminium cover, and the same enhanced corrosion-resistant treatment — more effective than any other treatment used by other manufacturers — protects the magnet and plates for outdoor and marine use.
At 3.4 kg, 131 mm overall diameter, and 99 mm depth, the 18 Sound ND2080A matches the titanium ND2080’s physical footprint exactly.
Performance and Applications for the 18 Sound ND2080A
The 18 Sound ND2080A delivers 111 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 80 W AES / 160 W continuous program power handling is lower than the titanium ND2080’s 200 W — the same aluminium-PEN-versus-titanium power handling trade-off documented on the ND2060/ND2060A pairing.
Notably, 18 Sound’s own product page lists the titanium ND2080 as this driver’s alternative/current model — a reversal of the typical succession pattern where the newer or more refined variant becomes the recommendation. This suggests 18 Sound may be steering the market toward the titanium platform’s higher power handling as the primary current recommendation, with the aluminium-PEN 18 Sound ND2080A positioned as a specialised, sensitivity-focused alternative rather than the mainstream choice.
For applications specifically requiring the absolute highest available sensitivity from 18 Sound’s 2-inch neodymium range, the 18 Sound ND2080A delivers a genuine peak figure — 111 dB — that no other conventional compression driver documented in this session’s HF coverage matches.
Conclusion – 18 Sound ND2080A Compression Driver
The 18 Sound ND2080A delivers the highest sensitivity of any 2-inch compression driver documented across this session — 111 dB from a 22 kGauss neodymium ring magnet and copper-sleeve-equipped aluminium-PEN diaphragm. Despite 18 Sound’s own page pointing toward the titanium ND2080 as the current alternative, this driver remains the sensitivity benchmark within 18 Sound’s compact 2-inch range.
For applications where maximum sensitivity is the defining requirement, the 18 Sound ND2080A delivers 18 Sound’s best available figure in this format.
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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.
