First featured in the 1970s RCA designers handbook 'Solid-State Power Circuits', the 1970s RCA circuit has formed the basis for Naim Audio's NAP power amplifier series for many years.
For some reason, the full potential and qualities of this deceptively simple circuit have never quite been realised - until now.
The good news is that over many years of experimenting and choosing components, we've gained an in depth knowledge and understanding of the RCA power amplifier circuit and taken the performance of this classic AB amplifier design into quite another league by creating the Avondale NCC200 boards.
The Avondale NCC200s may be used in upgrading existing Naim amplifiers or building from scratch. Thus it becomes possible to build your own astonishing stereo or mono amps at a fraction of the cost of buying new.
Using sophisticated techniques such as computer optimised signal paths and constructed from the highest specification components (eg. 1 Watt metal film resistors throughout plus Welwyn RC55 resistors in the signal path) with no ferrous materials.
The NCC200 modules are free of the constraints found in the Naim amplifiers: The NCC200 has local feedback networks added in the right places plus a carefully designed and voiced damped output inductor has been introduced which maintains amplifier stability under all conditions.
The network is totally non-invasive and does not compromise the rhythmic qualities of the amplifier in any way. The NCC200 is supremely musical and drives ANY length of cable, virtually ANY loudspeaker system with no current limiting and with much less phase shift - yet is almost impossible to provoke into instability.