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DUSSUN R30 REFERENCE Hyper Class A Integrated Amplifier


  R30 was an integrated amplifier developed and handcrafted elaborately to re-render full music sprit and connotation,whose design reference benchmark is state of the art counterpart hi-end integrated amplifiers’ performance, tone, function, construction and fabrication.

  Based on decades of experiences on research, development and handcraft for audio amplifiers by Dussun, every new design in R30 is aimed at the clear objective for sound quality and tone improvement.In order to achieve high fidelity output music signals by R30 against the music source, output characters matching electrodynamic loudspeakers’ electric-sound characters, design of R30 went through a long time repeated audition, measurement and improvement process, which made the finished R30 achieve the ideal matching level for signal magnification circuit, volume control circuit, power supply system and interior construction.

   In addition to the technical specification for a hi-end amplifier deserved, R30’s sound possessed outstanding quietness, rich details, dense timbre and transparent and spacious tone. It escorted the audience to rediscover the performing atmosphere and rich sound spatial information from those familiar CDs which was missed before. R30, made under the principle of uncompromising, became the first reference level integrated amplifier in Dussun product family by means of high performance and high sound quality.


● Ultra high-end 0.1db steps, left and right channel fine synchronized high precision volume control:

  Considering the volume control device as one of the souls of an amplifier, R30 employed Dussun developed volume control device, set up by a 16-bit digital controlled analogue circuit and possessed 1/65,535 level super fine resolution within whole volume control range.  This volume control comprising circuit high linear solid state switch and precise resistance, ensured precise synchronization of R30’s left and right channel volume control at any position within its 80 dB volume control range. All problems of sound quality degradation and application intervention from frequency and phase distortion, volume synchronization error, sliding friction noise, limited lifetime attribute to traditional volume control potentiometers’ various voltage ratio, was eliminated. Either in  working principle or practical performance, R30 reached the highest technical level fully among the state of the art hi-end amplifier volume control and pride upon taking part in  “Club of 0.1db steps volume control”.

●  Low distortion, Non-feedback Power output stage:

  The newest designed  “Optimized Self-Adaptive Bias Circuit”   Improved significantly the linearity in output stage signal crossover region, while maintaining huge power output without switch distortion. Much different from routine design which removed output stage feedback resulting in highly increased non-linear distortion, especially at high frequency range, R30 accomplished super low crossover distortion by its  “Optimized Self-Adaptive Bias Circuit”. 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 the whole audio frequency.

Thorough independent dual-mono channel full balanced design:

  R30’s left and right channel circuit as well as control units were equipped with individual independent power supply system. Data used to control individual channel was transmitted in terms of optical transmission. Absolute electric isolation made R30 true to its name, dual mono channel amplifier, which working as same as two sets of precisely synchronized independent mono channel amplifiers, nil stereo crossover between left and right channel, resulting in pinpoint accurate sound images.

● Strong control and pre-set functions:

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

Aluminium full functions remote control unit

Exclusive Dussun gold-plated high-current audio connectors

Detachable power cord system (IEC)




OUTPUT POWER: 2 x 200W Class A (8ohms);

                               2 x 360W Class A (4ohms)

FREQUENCY RESPONSE: 20Hz – 20Khz +/- 0.5db


GAIN RESOLUTION: 0.1 db steps above 31 in display (-50.0 dB)

GAIN:   6, 12, or 18 db selectable in the line stage

            26.8 dB in the amplifier section


S/N RATIO: >=105db (A weighed)


OUTPUT IMPEDANCE: ≤0.07ohm (20Hz to 20Khz)

DIMENTIONS: 440W x 197H x 500D (mm)

ABOUT “Hyper Class A”


  The “Hyper Class A”  is a “Green” Class A solution, whose technically successful adaptive-bias circuit achieves the extra large class A power output objective under conditions of low-power consumption and low heat production.

  The adaptive-bias circuit with an ideal specification permits the amplifier to maintain class A mode output even if speakers’ impedance drops largely and output power increases several times. This situation is different from the traditional pure class A amplifiers’ inevitable situation of returning to class B when the speaker load impedance goes down, and so Hyper class A is much close to the ideal class A amplifier essence

Voltage Standard Available: 220V, 230V, 240V

Further Questions: info@cattylink.com

After sales and Warranty: service@cattylink.com