max 389Technical data. SIZE (inch), P.R., TYPE, R.W. (inch), O.D. (mm), S.W. (mm), N.S.D. (mm), MAX LOAD (kg), MAX LOAD (lbs), INFLATION (bar), INFLATION (psi)NAD's C 389 HybridDital DAC amplifier offers audiophile-class performance, flexible connectivity, class-leading upgradability, and long