Sony STR-DA9000ES - Fm Stereo/fm-am Receiver Technischer Hintergrund - Seite 19
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In the STR-DA4ES (top), the signal flows from the center, to the sides
and back to the center again for point-to-point wiring to the speaker
output terminals. It's anything but straightforward. On the STR-
DA2000ES (bottom), the signal flows in one direction only.
Superb open-loop performance
Conventional amplifiers typically generate substantial distortion in "open-
loop" mode. That's why analog amps use Negative Feedback (NFB). NFB
constantly compares the output with the input, identifying open-loop distortion
and applying an equal-but-opposite correction signal at the input. NFB is a
powerful tool for limiting distortion, and NFB explains the low distortion
specifications common today. However, NFB exposes the signal to Transient
Intermodulation Distortion and other dynamic problems.
In contrast, the Sony S-Master Pro amplifier achieves excellent fidelity
without any negative feedback at all! Distortion remains low without any sacrifice
in transient and dynamic characteristics. Music comes alive. And movie sound
effects like car crashes and gunshots retain all their original impact.
Armed with S-Master Pro amplifier technology, the latest ES Series
receivers stand apart. They deliver high power output (up to 200 watts per
ES Receivers V3.0
Musicality and transparency
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