Digital to Analog Conversion



With the goal of creating a very affordable, yet superior DAC in mind the designers of Metrum Acoustics have developed a new DAC, the ONYX By Metrum Acoustics.It was an unprecedented challenge, which was eventually solved by using an entirely new chip, which has been exclusively developed by Metrum Acoustics and was first used in the PAVANE.

The parallel driven R2R ladder networks as used in the four DAC modules performs , especially when combined with our FPGA-driven “forward correction module”, on a higher level. This module splits up the audio samples for each channel into new separate data streams. Each dac cluster processes a portion of the data in the most linear region of the dac chips. The result of this process is an extremely high linearity, right down to -140 dB, which gives the ONYX a realistic 24 bit dynamic range. Due to the dual mono design over the entire frequency range an extremely high channel separation of 120 dB is realized. This contributes to the flawless positioning of instruments.

In short, the ONYX is a DAC that has taken all the lessons and experiences that her designer has learned over the years, and combined them in an ambitious DAC that can fit in every system. It is musical, honors the Non-oversampling principle while simultaneously incorporating the technological progress that has been made over the years.






Balanced Digital to Analog Converter
24 Bits Non Oversampling
Forward (FPGA) corrected
2 DAC'S per channel in differential mode
15 VA toroidal transformer
110/115V AC 220/230V AC 60/50Hz
Input 1x optical, 1x coaxial 1x BNC and USB
Output 1x RCA Stereo Pair Single ended 2Volt RMS
Output 1 x stereo pair XLR: 4 Volt RMS
Frequency Response 44.1 kHz sampling 1Hz – 20 khz -1 dB
Frequency Response 192 kHz sampling 1Hz – 65 kHz – 1 dB 192 and 384kHz (USB)
Distortion 0.006 % THD
Noise Floor -145 dB related to 2 Volt RMS
Output impedance RCA 100 Ohm, XLR 100 Ohm
Sampling rate Optical 44.1 – 96 kHz
Sampling rate Coax and AES/EBU: 44.1 -192 kHz
Sampling rate USB 44.1 – 384kHz
Dimensions 290 x 250 x 60 mm
Weight 3.1KG