Sony STR-DA1000ES ES Receivers Technical Background - Page 31
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• RS-232C interface (STR-DA2000ES and higher). To communicate with third-party room automation systems, these receivers include RS-232C ports. The ports also enable future firmware upgrades to the STR-DA5000ES and DA9000ES. • Front optical digital audio input (all models). As part of the Video 3 input of the front panel, these receivers also accept optical digital audio, in addition to Left/Right analog audio. • Assignable digital input (all models). An optical or coaxial digital input can be flexibly assigned to any video input, providing greater versatility when connecting a second DVD player, an HDTV tuner or other digital video source component. • A/B speaker terminals (all models). Real estate on the back panel of modern A/V receivers is severely limited. At the request of ES dealers, Sony found a way to add a set of B speaker terminals. Conclusion Beginning with the PCM-701ES digital processor in 1982, the engineers of Sony ES have been extending the capabilities of digital audio. Breakthroughs like the S-Master Pro amplifiers take audio reproduction to the next stage in sophistication, simplicity and sound quality. These ES receivers represent another milestone in the digital technology. To appreciate the difference, just turn them on and listen. ES Receivers V3.0 Page 31