Page 1
Input selection by special
controller without any
mechanic contacts;
integrated signal processing
Note:
HD board is removed
for this picture; for further
details, please see page 3
R
32 bit Microcomputer in so called
dual-mono construction
High precision D/A converter section
with 2 separate D/A converters
GIC filter
with Burr Brown OPA627 (10 pcs)
and analog output stage
R
Tube section constructed
with fine selected tubes;
for further details, please
see page 4
High voltage power supply
for the tube section only
High performance power supply for
the digital signal processing with
very accurate voltage stabilization
made of finest selected components
High performance power supply for the analog output
stage with several, series connected voltage controllers
for extremely precise DC voltage
Separate power supply
for tube heating only
© ACCUSTIC ARTS
Page 2
Magnetically shielded,encapsulated
toroidal core transformer (100 VA) of
premium quality (”Made in Germany”)
for the digital signal processing
Massive, 10 mm thick aluminium
side panel, brushed and anodised
(silver or black)
Note:
HD board is removed
for this picture; for further
details, please see page 3
R
Magnetically shielded, encapsulated
toroidal core transformer (50 VA)
of premium quality (”Made in Germany”)
for the tube section only
Turning knobs and logo made
of massive, high gloss finished
and chromed brass
Massive, 10 mm thick aluminium
front panel, brushed and anodised
(silver or black)
2 premium rotary switches („Made in Germany“)
with gold-plated silver contacts for a minimum
of 25,000 switching cycles
© ACCUSTIC ARTS
Page 3
R
Rear panel of all digital inputs of TUBE DAC II - MK 2
HD audio board (up to 192 kHz / 24 bit) with USB, Toslink and coaxial inputs
© ACCUSTIC ARTS
Page 4
Premium dual triode type 12 AX 7;
special military version;
4-times selected and matched
R
© ACCUSTIC ARTS
Page 5
Block Diagram of ACCUSTIC ARTS TUBE DAC II - MK 2
Digital Input Signal
(e.g. balanced)
from a CD Transport
®
Digital Receiver
Digital Bit Stream
High Precision 32 Bit Microcomputer
Digital / Analog-
Converter (left)
Analog Filter (GIC)
and Tube Hybrid
Amplification
1.Step: Transistor
(Burr Brown OPA 627)
2.Step: selected Tube
(Type 12AX7 / 7025 )
32 Bit Digital Filter
26 Multiplier-Processors (32 Bit)
plus 8-times Oversampling
Ultra High Precision Quartz
Channel left
2 x 32 Bit Signal
Channel right
Digital / AnalogConverter (right)
Analog Filter (GIC)
and Tube Hybrid
Amplification
1.Step: Transistor
(Burr Brown OPA 627)
2.Step: selected Tube
(Type 12AX7 / 7025 )
Balancing Section
(Burr Brown OPA 627)
Analog Signal
(balanced)
Balanced Output (left)
to external Preamplifier
Balancing Section
(Burr Brown OPA 627)
Analog Signal
(balanced)
Balanced Output (right)
to external Preamplifier
© ACCUSTIC ARTS
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