Daudio DAC User manual

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 ustomers
who want the ultimate in detail and transparen y from their daudio speaker. It
ontains a non oversampling digital / analogue onversion (DAC) whi h reprodu es
the musi in its purest form without any form of signal pro essing and filtering. When
listening it immediately will be noti ed that nothing artifi ial is added to the signal, it
sounds 'analogue', spa ious and at the same time also very detailed. The DAC has an
S/PDIF input whi h an be swit hed between opti al and oaxial so that two digital
sour es an be onne ted. This ould in lude the streaming audio from your musi
olle tion 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 whi h the analogue outputs
of your CD player, tuner or other analogue sour es su h as a phono preamp an be
onne ted.
The volume ontrol onsists of a network of very low-noise pre ision resistors whi h
are onne ted by a number of relays, ontrolled by a simple remote. The sliding
onta ts of the old volume ontrols are avoided (e.g. ra king potentiometers after
several years). The daudio DAC volume ontrol obtains even higher transparen y
than expensive step ontrollers. This way distortion artefa ts, as generated by the
widely used semi ondu tor ICs for volume ontrol, are of no on ern at all.
The only requirement to ensure optimal performan e is to onne t this unit to a high
quality amplifier with good quality audio ables, preferably not more than 0.75
meters. This is be ause the volume ontrol is a passive network without distortion
generating a tive amplifier omponents.
Electrical safety
On the inside of the housing of ele troni equipment, high AC and DC voltages exist.
The ase should therefore not be opened. daudio a epts no responsibility for
injury or damage aused by opening the housing or by onne ting to a power supply
voltage other than 220/230Va 50Hz.

daudio
Connection and operation
220/230Va 50Hz Opti al input line outputs
Analogue inputs Coaxial input
Warning: Conne t the daudio DAC with volume ontrol ompletely before plugging
the power ord into the so ket!
Analogue inputs
Conne t the analogue outputs of your CD player, tuner or other analogue sour es
su h as a phono preamp to the analogue inputs of the daudio unit to be able to use
the volume ontrol.
Optical input
Apply a TOSLINK able to use the opti al input. This input an be used with sampling
frequen ies up to 96kHz.
Coaxial digital input
Apply an RCA digital audio able with a spe ifi impedan e of 75 ohms to use the
oaxial input. This input a epts signals up to 192kHz.
Line outputs
Conne t the left and right line outputs to the respe tive inputs of your amp / preamp,
preferably with a good quality audio able of up to 0.75 meters maximum.
Remote control
The daudio DAC with volume ontrol omes with a OneForAll remote URC-6210, set
to ode 15322 for orre t operation. Operation is very easy, with the power button
the volume ontrol is put on and off, with the buttons hannel + and hannel - you
an su essively sele t input hannels C1 to C4 and the buttons volume + and volume
- are used to set the volume higher and lower.

daudio
Technical specifications
General
Inputs: 4 x stereo, 2 x analogue (C1 and C2) and 2x digital (C3 and C4)
Outputs: 1 x analogue stereo
Conne tors: gold plated Neutrik © in h
Output impedan e: < 8kOhm (value depending on volume)
Input impedan e analogue inputs: > 40kOhm (value depending on volume)
Power supply: 220/230Va 50Hz
Dimensions h x b x d: 50 x 236 x 290mm
Digital Analogue Conversion (DAC)
Operating prin ipal: non oversampling DAC, 4 DAC's per hannel
Inputs: 1 x opti al (C3), 1 x oaxial (C4)
Output level: 2 Vrms at full modulation
Slewing rate: 35V/μs
Frequen y range: 1Hz 0dB to half sampling frequen y -3dB (maximum 65kHz)
Distortion: 0,04% THD
Noise: -120dB / 16 bits and -125dB / 24 bits
Sampling frequen y: opti al 96kHz and oaxial 192kHz (maximum)
Volume control
64 steps of 1dB
Channel imbalan e: < 0,15dB
Remote control
OneForAll URC-6210
daudio
van Keppelmarke 73
8016 GJ Zwolle