AYA and USB interface, 2021 editions poll

According to the feedback we got recently, the interest in the USB interface and AYA projects may have re-emerged. And in case we find it adequate, we will go and release one or both of these projects again, as limited series.

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Amplifier A20

Audial’s second release for 2021 is the amplifier A20.

As opposed to its predecessor, Model A, the A20 brings five inputs, conventional 45 kOhm input impedance, revised exterior with LCD, and revised Audial-made copper binding posts as a standard feature.

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The TDA1541A story continues, and during February the S4 DAC got its successor, the S5.

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Swaps and trades

Our community forum includes a trade area, intended for Audial products, and associated or rare audio parts. You are welcome to post your offer or request.

Check it out >



Story of Asta

Read about the Asta development process, and have a first look inside.

Story of Asta >



PC: Today’s grey area of hi-fi experience

So, it is a tricky zone to be in. But we tried to shed some light on the subject. From an esthetically oriented, rationalist point of view.

Read this community forum topic >




AYA 4 was a limited edition of famed AYA DAC, with 192 or 384 kHz asynchronous, optionally four-channel capable USB stage. It was offered both as a completed unit and in a DIY form.

Read more about the AYA 4 >



Binding posts

Originally designed and produced for Audial amplifiers, these real copper binding posts are now available as aftermarket or OEM items.

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Another story about TDA1541A: 384 kHz

So, is it 384 kHz capable?

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Back to the roots: 14 bits (of TDA1541A)

How much does the number of bits matter? TDA1541A distortion performance shows no practical difference between its regular 16 bit, and 14 bit “mode” of operation. When it comes to the ladder (“R-2R”) DACs distortion, it looks like everything is about converter accuracy. More bits improve only on S/N ratio.

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Firmware updates for USB interface boards

Firmware version 3.5 enables 352.8 kHz and 384 kHz support with TDA1541A simultaneous data or PCM1704 output.

Version 3.6 brings 4-channel functionality with I2S output. That way the USB board with firmware 3.6 and two stereo DACs can be also used as a two-way digital crossover.

These updates are available for download for both original, and Mk2 USB interface board version.





Transformer output coupling

Audial reference DACs offer the transformer output coupling possibility. These two articles describe the major differences between the transformer and more conventional capacitor coupling, as well as the different approaches to system grounding.

Transformer coupling pros and cons

Classic and transformer coupling: System grounding difference



Model A volume control

These articles bring more details about the ultimate volume control used in the Model A. The first of them describes the approach, and the second brings more information about cermet potentiometers.

Check them out.

Model A volume control

Cermet potentiometers



About Audial

Officially operating for 15 years now, Audial became well established among the audio devotees, and recognized for its unique products qualities.

We shipped the products to more than 40 countries so far.

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