Violectric DHA V590² Pro Headphone Amplifier, Preamp, and DAC - Manual (Page 17)

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- x4, the white "x4" LED indicates that the resampling function is activated. The digital input word
will be recombined and forwarded to the D/A converter at four times the original sample rate.
DSD is transferred into PCM.
- BEST, the white “BEST“ LED indicates that the resampling function is activated. The digital input
word will be recombined and forwarded to the D/A converter at a sample rate of 96 kHz, a rate at
which most contemporary converters perform best. DSD is transferred into PCM.
The remote control enables a direct access to the above modes.
THE DIGITAL to ANALOGUE CONVERTERS
comprises the adjustable digital filters (see software menu 2 on page 23), the D/A converters as
such, as well as the analogue output filters. The converters are based on a delta-sigma architecture
and provide a dynamic range of 123 dB and THD+N -112 dB. According to the double-mono
architecture two 32 Bit D/A converters per channel are used inside DHA V590 to achieve higher
linearity and lower noise.
An incoming 16, 20 or 24 Bit signal is expanded in a 32 Bit signal inside the converters as long as it
was not completed by the resampling circuitry before.
The internal frequency of the digital signal (and potential interference therein) is very high in
comparison with the useful analogue frequencies. Therefore, the subsequent analogue low-pass
filters have to meet less severe requirements in terms of high-frequency roll-off and can therefore be
realized as "musical", discrete two-pole filters.
THE VOLUME ATTENUATOR
is to set the desired volume for
the left and right channel
simultaneously.
Volume can also be set via your
remote control by depressing the
“VOLUME +/-” buttons. For this
purpose, the volume control is
actuated by a servo motor.
Manual operation of the knob at
the same time – although not
useful - is possible without the
risk of damage.
As an option (DHA V590 PRO), the attenuation is made in 256 steps of 0.4 dB each.
The steps are switched with special “reed relays”. Here, the switching contacts are situated in a tiny
glass tube filled with a protective gas. The contacts are actuated by a magnetic field.
BALANCE CONTROL
is provided to compensate moderate level differences between left and right channel. These may
root in the recorded material itself, noticeable differences between left and right headphone system,
or differences in the user’s individual hearing.
All of the above can be carefully compensated.
The balance control offers a precise centre detent in case no adjustment is necessary. In order not to
impair the perfect crosstalk specs of DHA V590, it takes effect on the right channel only.