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frequency and signal level. Therefore
noise at very low signal levels that was
difficult to contain with conventional delta
sigma converters now could be drastically
reduced. The audible result is music
reproduction emerging from utter silence with
an impressive sense of clarity and nuance.
Volume control with smooth analog feel
A massive knob on a precision-machined shaft
rotates a disc with star-shaped slits which
Fig. 2 MDS type D/A converter principle
generate a series of pulses in
a phase detector. These
pulses are utilized by a
microprocessor to govern the
volume control function. For the user,
the volume control of the DC-330 operates
with a silky smooth and natural feel that perfectly
matches the audible change in volume. The
current volume setting is indicated by the
numeric display and also by an array of LEDs
on the circumference of the control. This lets
you check the setting at a glance.
Linear phase analog filters provide superior
characteristics
The analog filter, which serves to remove
aliasing noise in the extreme upper frequency
range, is a 3-pole linear phase type filter with
outstanding phase characteristics. The cutoff
frequency is optimized to minimize phase shift
within the passband. Strict selection of all filter
components assures sonic purity and total
musical accuracy.
D/A converter with printed circuit boards
made from Teflon (glass fluorocarbon resin)
with low dielectric constant and low loss
The D/A converter boards use a substrate of
nThis photograph shows the DC-330
with separately available option boards
installed and with the shielding cover
removed.
nPCB assembly with analog
output connectors (balanced
and unbalanced, 2 each) and
MDS D/A converter (2 boards
for left and right) using Teflon*
(glass fluorocarbon resin)
substrate with low dielectric
constant and low loss.
nSupplied remote commander
RC-24
Allows input selection and
adjustment of volume, tone
control on/off, loudness com-
pensator on/off, attenuator
on/off, and other functions.
glass fluorocarbon resin which has a stable, low
dielectric constant as well as superior heat
resistance and high-frequency characteristics.
Using this material for the audio circuitry assures
signal transmission with utmost purity, resulting
in a clear improvement in perceived signal-
to-noise ratio. In the DC-330, gold-plated copper
DAC
#1
#2 S 1 e1 S2
e2
Sn-1
en-1
S0
e0
Sn
en
#1
#
n
MDS
output Digital
inputSignal
Conversion error
