DAC
daudio
DAC with volume control
and source selection
User manual 29 September 2013
daudio
Introduction
The daudio DAC with Volume Control is designed to fulfil the wishes of customers
who want the ultimate in detail and transparency from their daudio speaker. It
contains a non oversampling digital / analogue conversion (DAC) which reproduces
the music in its purest form without any form of signal processing and filtering. When
listening it immediately will be noticed that nothing artificial is added to the signal, it
sounds 'analogue', spacious and at the same time also very detailed. The DAC has an
S/PDIF input which can be switched between optical and coaxial so that two digital
sources can be connected. This could include the streaming audio from your music
collection on hard disk, the digital output of your CD player or digital audio signal
from your TV tuner.
This daudio unit also provides two analogue inputs to which the analogue outputs
of your CD player, tuner or other analogue sources such as a phono preamp can be
connected.
The volume control consists of a network of very low-noise precision resistors which
are connected by a number of relays, controlled by a simple remote. The sliding
contacts of the old volume controls are avoided (e.g. cracking potentiometers after
several years). The daudio DAC volume control obtains even higher transparency
than expensive step controllers. This way distortion artefacts, as generated by the
widely used semiconductor ICs for volume control, are of no concern at all.
The only requirement to ensure optimal performance is to connect this unit to a high
quality amplifier with good quality audio cables, preferably not more than 0.75
meters. This is because the volume control is a passive network without distortion
generating active amplifier components.
Electrical safety
On the inside of the housing of electronic equipment, high AC and DC voltages exist.
The case should therefore not be opened. daudio accepts no responsibility for
injury or damage caused by opening the housing or by connecting to a power supply
voltage other than 220/230Vac 50Hz.
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