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40
US
About D.A. Hybrid Amplifier
A newly developed D.A. hybrid amplifier is
built into the speakers. A GaN device that
is capable of high-speed switching was
installed to the final stage of the power
amp in order to achieve high-precision
amplification for frequencies up to 100 kHz.
Furthermore, the GaN device, combined with
D.A. hybrid technology that was developed
with the headphone amplifier, TA-ZH1ES,
enables an unprecedented coexistence of
the superior audio characteristics of a full
digital system.
Use of new device, GaN, in
power switching (power
amplifier circuit)
The next-generation switching element,
GaN, has been introduced (a total of
8elements for 4 pairs per channel).
GaN devices have no stored charge and are
capable of high-speed switching—a max
of 10 times the conventional Si-MOSFET.
The PWM signals for Sony’s high-precision
S-Master can be switched faithfully at a
high-speed, without any loss, and achieve
the 100 kHz playback with these speakers.
GaN MOS FET
Ideal Switching Waveform
Operating principles of the
D.A. hybrid amplifier
The D.A. hybrid amplifier increases the
reproduction of the high-resolution sound
source to the extreme. It keeps the high-
information quantity and high-resolution
sound quality of the full digital amp,
S-Master HX. Signal correction, which uses
the analog circuit, further reduces large
distortions and digital noise during output.
The signal for the speaker terminal (plus
side) that is output from the audio pulse
driver of the full digital amp, S-Master HX,
produces some errors due to phenomena
such as load fluctuations. The ideal signal
generated through a precise low pass filter
from the processor of the S-Master HX is
subtracted from the signal, including the
errors, and only the errors are extracted
and amplified by the analog power amp.
Errors are canceled by inputting the errors
found by the analog circuit into the speaker
terminal (minus side) and the speaker
terminal (plus side), which includes the
errors. Only the ideal signal comes out of the
speakers.
Usually, an analog power amp is used to
amplify only the errors; however, with the
speaker's D.A. ASSIST knob (page 31)
set to BLENDED, the signal is added to the
analog amp and amplified. By limiting the
output from the digital amp, you can enjoy
a tone from the features of both the digital
amp and the analog amp combined.
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