Sony STR-DA555ES - Fm Stereo/fm-am Receiver Technische achtergrond - Pagina 29
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Short, straight and simple chassis layout.
From Sony's early days in high fidelity, our engineers have understood
that simpler is better. For this reason, they have aimed to keep internal point-to-
point wiring to a minimum. The internal chassis layouts of the STR-DA3100ES
and DA2100ES are outstanding examples of this "short, straight and simple "
philosophy. Inputs pass directly from the back panel to the input selector,
Optimum Preamplification (OP) processing and the power amplifier, in that
sequence. It's a short, straight trip.
Analog board of the STR-DA2100ES shows Sony's smart, simple and
straight chassis layout.
OP Processing with 0.5 dB steps
Sony's Optimum Preamplification (OP) design is featured on the STR-
DA3100ES, DA2100ES and DA1000ES. The system varies the preamp negative
feedback according to the volume control setting. In this ways, Sony balances
gain and volume control settings to achieve a 10-dB improvement in signal-to-
noise ratio across most of the volume control operating range. So high-
resolution audio is reproduced against a background of silky silence.
ES Receivers v1.0
Page 29