User manual WHITES ELECTRONICS SEARS 59643

[. . . ] The world's first Dolby® Surround decoder to operate in the digital domain (SDP-505ES, 1986). World's first floating-point 32-bit preamplifier (TA-E9000ES, 1998). Sony's latest A/V receivers are worthy successors, carrying this heritage forward to a new generation of home entertainment enthusiasts. Page 3 Page 15 Page 21 Page 30 Page 32 ES Receivers V3. 0 Page 2 S-Master Pro Technologies Digital amplifiers have been around for decades, occupying a place outside the mainstream of home audio. But important trends in audio technology are creating significant reasons to prefer digital amplification. [. . . ] This combines two components, the original audio signal (B) and a noise component (C). The audio signal (B) looks smooth and continuous because the frequencies are low. The noise component (C) looks abrupt and spiky because the frequencies are high. The Low Pass Filter (LPF) effectively separates out the audio signal, for extremely accurate music reproduction. ES Receivers V3. 0 Page 6 Low-Pass Filtering (LPF) (B) audio elements (C) noise elements Frequency The action of the LPF. The red lines show the characteristic of the LPF, which suppresses the noise elements (C) on the right. These are high frequencies, which do not pass. The S-Master Pro process While Sony's S-Master Pro amplifier is simple in principle, the fidelity of the output signal depends on getting each pulse exactly right. That is, the leading and trailing edges of each pulse must have the right timing--and the height of each pulse must be carefully controlled. So to accomplish these goals, Sony used technologies developed for our legendary SCD-1 Super Audio CD player. Sony's own CXD9730 Large Scale Integrated circuit (LSI) provides the S-Master Pro processing. The S-Master Pro process converts the incoming signal to a one-bit Complementary Pulse Length Modulation (C-PLM) stream, after which the Pulse Height Volume control sets the volume level. The S-Master Pro process is performed by the Sony CXD9730, a proprietary Sony Large Scale Integrated circuit (LSI). ES Receivers V3. 0 Page 7 As a primary manufacturer of Large Scale Integrated circuits (LSIs), Sony has the freedom to pursue innovative thinking like S-Master Pro and then express this thinking in silicon. The result is the Sony CXD9730. The S-Master Pro system involves eight important technologies: · · · · · · · · Clean Data Cycle Synchronous Time Accuracy Controller (S-TACT) Complementary Pulse Length Modulation (C-PLM) Pulse Height Volume Control DC Phase Linearizer Discrete Output Transistors Toroidal Low Pass Filter Two-Stage Pulse Power Supply Clean Data Cycle While digital signals are inherently resistant to noise and distortion, they are susceptible to time-base errors called jitter. The typical method of controlling jitter is Phase Locked Loop (PLL) clock regeneration. The STR-DA2000ES, DA3000ES and DA5000ES use low-distortion Field Effect Transistors (FETs), while the STR-DA9000ES uses deluxe Metal Oxide Semiconductor FETs (MOS FETs). The result is another measure of signal integrity. ES Receivers V3. 0 Page 12 The discrete output FETs of the STR-DA2000ES. Toroidal Low Pass Filter The Low Pass Filter is a crucial stage in any digital amplifier. The filter must have a turnover frequency high enough for high-resolution audio, yet have a cutoff characteristic steep enough to suppress high-frequency noise elements. That's why the engineers of Sony ES selected the filter parts carefully and methodically. Instead of choosing less expensive cylinder-type coils, the ES engineers chose exotic toroidal coils, optimized for sound. Customers will never see these toroidal coils, but they will hear the benefits in clean, open, non-fatiguing music reproduction. The toroidal coils of Sony's Low Pass Filters are more expensive. But their contribution to sound is more than worth the price. ES Receivers V3. 0 Page 13 Two-Stage Pulse Power Supply The power supply is always a critical component of amplifier sound quality. That's why Sony designed the S-Master Pro amplifiers with incredibly stable power supplies. The STR-DA2000ES, DA3000ES and DA5000ES take advantage of Sony's twostage pulse power supply. At 200 watts per channel across seven channels (20--20, 000 Hz, 8 ohms, 0. 15% THD), the STR-DA9000ES required something even more robust, an absolutely massive Toroidal power supply, discussed later in this paper. Simply stated, a receiver's power supply should output stable voltage no matter what the music is doing. [. . . ] On the left, the waveform can cause complex--and thoroughly unwanted--changes in the temperature and performance of the output transistors. On the right, the transistors perversely generate the most heat at moderate output levels--the levels you're most likely to experience most of the time. At full output, heat generation is near zero. In dramatic contrast, the S-Master Pro amplifier does not generate substantial heat. What's more, any small thermal effects that might persist wash out of the signal because digital amplifier output transistors do not "shape" the output waveform in the way that analog output transistors must. [. . . ]