The R28 Audio-GD is an all-in-one unit of rare versatility that merges in a single housing a very high quality full R-2R DAC with a discreet balanced preamplifier and a high precision headphone amplifier. This extremely comprehensive element can make every audio device found in a sound installation benefit from Audio GD expertise. Several sources (including analog) can be connected, giving the R-28 a  potential to become a real cornerstone of any ambitious audio system; facilitating wiring and connections while ensuring a rigorous and clean signal processing regardless of the source. Its compatibility with the most advanced audio formats, plus its pannel of inputs and outputs provide impressive interoperability with all equipment and the most popular fild of digital audiophile world.

Discrete balanced analog output & ACSS

The analog output stage of R-28 is composed of several amplification stages, each of them completely discrete and based on matching transistor pairs. 4 pairs of transistors 15W provide excellent ability to drive the signal.

True to the tradition of Audio-GD, R-28 has an analog current output ACSS Mini XLR completely protected from feedback and with very low output impedance. This unique design is prized for its fine detail and for its superior sound stage in the final restitution.

The device has an integrated volume control operating on 4 channels. These are controlled by digital signal and control resistors for analog setting. Resistors KOA / Vishay work in parallel to provide a tolerance of 0.05%.

It is possible to bypass the preamplifier with a single button on the rear of the housing in order to output the sound DAC as it is and output to an external controller.

Effective power supply stage

The R28 operates high quality R-Core transformer, low noise and low magnetic noise. This supply is divided into 11 groups that are themselves selected for their ultra-high speed and ultra-low noise.

A double stage technology ensures the continuity and the cleanliness of the signal towards all digital stages.

Moreover, the analog amplification stages takes advantage of two pure class supply blocks A.

Versatile connectivity panel

Bringing together the audio sources, R-28 has a full hyper-connectivity that will greatly facilitate its integration into all types of sound installations, starting with the most ambitious.

There is an HDMI input (I2S), USB, Optical and Coaxial, but also analog inputs XLR that will bring together digital and analog sources on this same device to allow a greater control from a single device.

As regards to outputs, R-28 is equipped with an RCA connectivity / ACSS and XLR (balanced). All these options ensure maximal interoperability despite its high technical level.