At the heart of the Delphinus is a true R-2R resistor ladder built from high-precision resistors with a maximum tolerance of 0.005 percent. This design differs fundamentally from conventional delta-sigma DAC solutions, as it converts the digital signal into an analog signal through a discrete resistor network.

The advantage of R-2R operation is that signal conversion takes place in a more direct way, with fewer digital processing stages that would significantly interfere with the original structure of the signal. The precision resistor network plays an important role in channel balance, dynamics, and detail retrieval, as the quality of the analog output signal is already shaped by the first stage of digital-to-analog conversion.

The Delphinus can be used in Original Bitrate (NOS) mode and Oversampling (OS) mode. NOS mode preserves the original sampling frequency, so the DAC performs no additional digital processing before converting the signal. This operation represents the classic approach of R-2R DACs, prioritizing the most direct possible digital signal path.

OS mode, by contrast, applies oversampling processing, which may result in a different type of digital conversion and a different sound character. Having both modes available allows for more flexible system tuning, as the same DAC can be matched more precisely to the overall character of different sources, amplifiers, and loudspeakers.

Digital signal processing is handled by an Altera main control chip and an FPGA algorithm chip. This combination is responsible for stable input management, control of the digital signal path, and processing of high-resolution formats. The FPGA plays a particularly important role in I2S compatibility and in the reliable operation of the various digital inputs.

The Delphinus can receive signals up to PCM 1536 kHz and DSD1024 via USB and I2S inputs. The coaxial, optical, and AES inputs support PCM 24-bit / 192 kHz and DSD64 DoP64. This division clearly reflects the device architecture: USB and I2S provide the full resolution range for the highest-bandwidth data streams, while the classic digital connections ensure stable, widely compatible operation.

On the analog side, the Delphinus offers one RCA output and one XLR output, with signal levels of 2 and 4 Vrms. The higher output voltage of the balanced XLR interface can be important when used with preamplifiers, integrated amplifiers, or headphone amplifiers equipped with fully balanced inputs.

Warning! Simultaneous use of the RCA and XLR outputs is not recommended, as the signal may also pass toward powered-off devices, which can degrade the sound quality of the system.

The internal power supply of the Delphinus is handled by an 80-watt toroidal transformer, providing stable power for the digital and analog circuits. In an R-2R DAC, the conversion network, clock management, and analog output stage are all sensitive to noise and voltage fluctuations, making power supply quality especially important.

Warning! The device’s mains voltage level is factory-set. Before purchase, please check that the selected version matches the specifications of the electrical network available at the place of use.

Due to the R-2R architecture of the Delphinus, a longer burn-in period of approximately 300 hours is recommended for its stable operating character to develop. In addition, keeping the unit in continuous standby or powered-on mode during the initial period can help the components stabilize in operation.

This period can be especially important because of the fine operating balance between the analog output stage, the power supply, and the R-2R network. The character of the DAC may become more even after the initial period, so final system tuning is best carried out once stable operating conditions have been reached.

A remote control is included in the package, enabling convenient input switching and operation even when the Delphinus is placed in a larger space, such as a living room, or in a HiFi chain using multiple digital sources.

The relatively low-profile design of the device allows for space-saving system integration, while the metal chassis and internal toroidal transformer provide a stable structural foundation worthy of a desktop DAC.