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USB DAC 128 mkII  from Henry Audio is

High Fidelity Computer Audio
Open Source Hardware

Do you want the best sound quality from your computer? A USB DAC will sound a lot better than the output from the computer's audio plug. Our DAC delivers a surprisingly good sound quality and doesn't cost a fortune. Just see our reviews.

For a great sonic performance, pair the USB DAC 128 mkII  with your favorite headphone amplifier or home stereo. The DAC uses high quality RCA outputs and supports asynchronous USB Audio with sample rates up to 192kHz. It works on Mac, Windows and Linux.

The mkII  packs more punch and better overall audio quality than its predecessor (Henry Audio USB DAC 128 and QNKTC AB-1.2).

The USB DAC 128 mkII  is developed by an online group of enthusiasts and sold by the Norwegian company Henry Audio. It is an Open Source Design. It will sound great just out of the box. But those so inclined are invited to continue developing it and sharing their discoveries.



People are saying great things about our product

Paul Rigby - The Audiophile Man - gives the USB DAC 128 mkII a super-rare "Deeply Groovy" award and 9/10 points.

"It is a groundbreaking design because of a combination of factors. Firstly, and most importantly, for its sound quality over a number of resolutions and how it compares with my reference.”

USB DAC 128 mkII :

“Recommended for - portability, good sound quality with finesse, strong bottom end and ability to explore many genres very well.”

“The USB DAC 128 is top of its class”

“Put simply, if you’re in the market for a DAC, I would advise you to place the DAC 128 at the top of your must-hear list.”

“The sound is smooth, spacious and well textured, and this is completely unexpected given its very modest price.”

“You get the sense of a crisp autumn morning with brilliant sunshine throwing everything into sharp relief.”

"It has the sort of presentation that one associates with high end converters."

"It resolves low level detail uncannily well and makes all manner of recordings sound good."

En teknisk artikkel om prosjektet som ligger bak AB-1.2. Det er også et bilde fra lab’en og en god forklaring på asynkron USB. Bildet viser et reelt debug-signal fra firmware i DAC’ens prosessor.

“I bruk er konverteren en fest.”

“Fantastisk lydkvalitet til en utrolig lav pris. Mer er det nesten ikke å si. Bortsett fra ‘løp og kjøp.”

“Den låter luftig, detaljert og dynamisk. Det er lett å plassere instrumenter i lydbildet, og det hele låter rett og slett veldig naturlig, åpent og avslappet. Utvilsomt et meget godt kjøp!”

“Tett, veldefinert bass, nøytral klangkarakter, veloppløst og detaljert uten tegn til skarphet. Kjapp, dynamisk spillestil.”


The Henry Audio USB DAC 128 mkII  is sold with the help of PayPal. The Henry Audio website will not see or store your credit card number. Please order according to your location. Shipping to Europe, the US and Canada is included in the price. Orders to all other destinations (Russia, Asia, South America and Oceania) must select $320 shipment with tracking. Orders to EU countries are sent from within the EU. Orders to Norway are sent from Norway. If PayPal is inconvenient for you, please use the contact information at the bottom.

Thank you for your purchase!

North America



With tracking


The Fact Sheet has a user manual and all the technical details about the USB DAC 128 mkII . It even includes the Open Source schematics for the complete design.

All Windows users are recommended to download and install the driver. High resolution playback uses the included Open Source Windows ASIO driver.

The USB DAC 128 mkII  is out there in the open! This page will give you a lot more information on web communities and the Open Source development of the DAC.

It is important that you feel safe whenever you decide to purchase a Henry Audio product. Please use this link to read about all Terms & Conditions, Return & Refund, and Privacy & Shipping.

Design & code by Found.

Photography by Dag Dalvang