However, the ESS version is recognized by a small C at the end of the serial number sticker (B stood for AKM 4493). Remote, display, general behavior, operation and handling.ĪDI-2 DACs with AK4493 and ES9028Q2M are neither sonically nor visually easily distinguishable. Lightning fast sample rate change on playback Stead圜lock FS, including the latest 1 Hz filter technology Analog input and output circuitry, including Auto Ref and 2.5 dB digital headroom Complete DSP functionality (PEQ, Bass/Treble, Loudness etc.). Tech specs and features are based on RME technologies, and they are available unchanged also with the ESS chip: This chip is very similar to the AK4493 in features and technical specifications, which allows RME to continue offering the ADI-2 DAC in its well-known supreme quality, and with a nearly identical feature set.Įven though this chip is a central (sometimes sole) quality determining element, the ADI-2 DAC is just not a normal DAC. The current unit uses an ES9028Q2M for its high-quality DA conversion. The ADI-2 DAC was initially based on an AK4490, later on the AK4493. Therefore, many manufacturers - like RME - are forced to either discontinue products based on AKM chips, or to use other chips for the foreseeable future. A resumption of production and thus availability of these components is not expected before 2022. Here is what page 4 has to say:Īt the end of 2020 a fire destroyed AKM's production facilities for AD and DA converter chips. The printed manual (version 2.6, online now is 2.7) does not hide this fact. Because most of them don't even write in forums! We are shipping the DAC with ESS for more than 2 weeks already, and not a single customer has released that information. Sometimes we think that forums are the center of the universe, but they are not.
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