USB interface, series 2

Originally released in 2016, as ready made module (shown on the picture below), this high quality asynchronous USB interface featured galvanic isolation, two XO master clocks and reclocked output. It was unique for its ability to output TDA1541A simultaneous data format, but it could also output I2S / SPDIF, or PCM1704 format, supporting dual balanced DAC topologies at that as well.

At this time we are accepting orders for second run, and now this interface is available both as ready made module, with u.FL, and as completed device, with BNC output connectors.

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Transformer coupling pros and cons

Purely sonically, transformer coupled output has more calm presentation, with more quiet background, and somewhat more precise soundstage. On the other hand, transformers can lack some definition at the most bottom end. Actual benefits and shortcomings will also depend on the environment.

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Model A ultimate volume control

Two new articles bring more details about the ultimate volume control used in the Model A. The first article describes the approach, and the second one brings more information about cermet potentiometers.

Check them out.

Model A volume control

Cermet potentiometers



Binding posts

Premium version of Model A uses Audial made, real copper binding posts. Now these are available for separate purchase.

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Even though it was discontinued in 2009, the interest in this great DAC never actually disappeared, so it had several after-runs. “DS” was its 2015 release.

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