Most high-end audio amplifiers are analogue. Analogue amps boast a long history and their sound quality improvement technologies such as circuit systems and parts development are regarded as having been fully established. Digital amps on the other hand still have great potential for further development since rapid technical advancements in recent years have enabled high-accuracy signal processing not possible with analogue systems. Given that todays mainstream music sources are digital such as CD and streaming platforms digital signals should ideally be processed in the original digital format. Furthermore devices such as AD converters are also advancing allowing high-precision digital signal processing of analogue music sources. Under such circumstances Technics has been devoted to the development of digital amp technology since 2014. In creating the SU-R1000 Reference Class product Technics took the following technical approaches.