The R30 beside others in its design offers the following highlights:
High precise volume control in 0.1dB steps with left and right channel fine-synchronized:
Considering the volume control device is one of the souls of an amplifier, R30 employes a DUSSUN- developed volume control device, which set up by a 16-bit performance, digital controlled analogue circuit and possesses 1/65,535 level superfine resolution within whole volume control range.
This volume control comprising circuit high linear solid state switch and precision resistors, ensures precise synchronization of R30's left and right channel volume control at any position within its 80 dB volume control range.
It practically eliminates all the problems such as sound quality degradation, application intervention from frequency and phase distortion, volume synchronization errors, sliding friction noise, limited lifetime attribute of traditional volume control potentiometers, various voltage ratio, and so on.
No matter whether working principle or practical performance, as a fact the R30 reached the highest technical level fully among the state of the art hi-end amplifier volume control and takes part "Club of 0.1 dB volume control'.
Power output stage with low distortion, non-feedback at power output terminal:
The new designed "Optimized Self-Adaptive Bias Circuit", much different from routine design where output stage feedback always leads to large non-linear distortion especial at high frequency side, improves significantly linearity in output stage signal crossover region, while maintaining large power output without switch distortion. By adopting this system R30 accomplished super low crossover distortion.
Along with the most nature and spacious tone from a "non-feedback at output terminal amplifier'', R30 achieved the perfect result of full power output, low distortion, high sound quality in whole audio frequency.
Thorough independent dual-mono channel design:
R30 left and right channel circuit as well as control units are equipped with individual independent power supply systems. Data used to control individual channel is transmitted optically.
Absolute electric isolation made R30 is true to its name, dual mono channel amplifier, working same as two sets of precisely synchronized independent mono channel amplifiers, with nil stereo crossover between left and right channel, resulting in pinpoint accurate sound images.
Strong control and pre-set functions, such as:
Individually pre-set gain level for all input terminals
Individually pre-set channel name for all input terminals
Display screen brightness adjustable for 4 levels
Maximum volume pre-set to protect expensive loudspeakers
Fade-in volume when switching on
Aluminum full function remote control unit