About the Onyx
The Metrum Acoustics Onyx is a standalone digital-to-analog converter (DAC) from the Netherlands-based manufacturer, featuring a non-oversampling (NOS) design with four second-generation Transient DAC Two (DACTWO) R2R ladder modules—two per channel in parallel, controlled by an FPGA for optimal linearity. It delivers a -145 dB noise floor, 24-bit dynamic range, and 120 dB channel separation, ensuring precise instrument positioning and a smooth, refined sound with excellent bass and soundstage. Inputs include USB (up to 384 kHz), coaxial SPDIF (up to 192 kHz), optical (up to 96 kHz), and AES/EBU (up to 192 kHz), with optional I2S and MQA modules available. Outputs are balanced XLR and single-ended RCA. Power is supplied by a 15 VA toroidal transformer. Dimensions are 290 x 250 x 60 mm, weighing 3.1 kg. Metrum Acoustics has ceased operations due to bankruptcy, making new units unavailable.
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