FX-AUDIO UK-01 USB DAC CM6533 Headphone amplifier MAX9722 Digital interface portable

FX-Audio UK-01
The FX-Audio UK-01 is a 96kHz USB DAC with analog (Line) and digital (Optical & Coaxial) output. It also has a dedicated headphone output.

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Shipping date: 26-08-2019.

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USB DAC / digital interface / Headphone Amplifier / volume control source 96kHz / 24bit


The UK-01 is a 96kHz USB DAC with analog output (Line) and digital (Optical & Coaxial). It has ADDITION a dedicated headphone output.

This device - amazing for its size (93.2x52x13mm / 54g) and its many features - is particularly useful in connecting a snap your mobile configuration with your fixed audio system. It also represents a valuable space saver for sedentary audio systems to a minimum space.

It is powered by USB (USB-A input) and can operate with a digital source such as a computer or an Android device using a micro-USB male / USB-A Male ensuring data transfer.


CM6533 interface

The UK-01 takes its functionality procession to a CM6533 chip. The latter supports USB / SPDIF interfacing and the DAC 2-way function.

In its DAC function, the chip manages sampling frequency from 8 to 96 kHz with a resolution 16 / 24bit.

Mode digital interface (SPDIF Optical / Coax), the audio stream supports frequencies up to 48kHz.

MAX9722 chip amplification

The device uses an audio amplifier chip stereo DirectDrive 130mW @ 32Ω MAX9722 to his headphones.

The chip meets the specifications for a clean, consistent sound reproduction in the context of a nomadic / compact sound system.

There are differential inputs and suppression of enhanced noise. The apparatus thus sees low distortion (THD + N of 0.03%), a 91dB signal to noise ratio inherent protection anti clicks / pops and a low audible spectrum very well preserved through integrated on each output capacitors,


3.5mm Jack on outputs

All outputs are about 3.5mm silver - including the digital output that will require a Mini-Toslink to Toslink cable (no supplied with this item).

This choice allows to keep a very compact form-factor while using primarily a common and easy to handle connectivity.

Controlling the digital source volume

In its USB DAC function, the UK 01 is capable of driving the source volume (digital) by sending signals up volume / down volume that will be recognized by all compatible operating systems (Android & Windows).

It is not an internal volume control but a remote control of the source. For example, if the UK 01 USB DAC is connected to a computer running Windows, the VOL + and VOL- buttons will directly increase / decrease the volume level mixer operating system. It's the same for Android systems.

Piloting the source volume

Test du FX-Audio UK-01 par Qobuz

" In conclusion, this DAC with FX-Audio UK-01 headphone amplifier is both simple and easy to use while being very pleasant to listen to. And inexpensive. "
Test Qobuz
digital interface
headphone amplifier
OutputCoaxial / Optical jack 3.5mm
3.5mm headphone
Line of 3.5mm
RMS level0.9Vrms
THDLine: 0.03%
Headphone: 0.04%
SNRLine: 91dB
Headphone: 91dB
Frequency response20Hz-20kHz ± 0dB
Headphone: 20Hz-20kHz ± 0.5dB
Parts supplied
Audio FX UK 01x1
USB-A Cable Male / USB A Malex1
Data sheet
OutputJack 3.5mm
DAC ChipCM6533
Max sampling rate96kHz
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FX-AUDIO UK-01 USB DAC CM6533 Headphone amplifier MAX9722 Digital interface portable
The FX-Audio UK-01 is a 96kHz USB DAC with analog (Line) and digital (Optical & Coaxial) output. It also has a dedicated headphone output.

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