Sorry, you're wrong.
The 70ES gary mentioned also uses Sony's S-Master chips.
ok, enlighten me.
what is the S-Master chip...and what does it have to do w/Sony's proprietary digital amplification? Is that a part of the electronics involved? AFAIK, the only models using this "digital drive" is the str-da2/3/5/9000es. I'm sure other Sony products share similar technology, but these are unique.
Let me quote Doug Oade from his forum:
I had a chance to do some serious listening to some digital amps. I find the new Sony line up to be the best by far. They sound so good in a show room setting, I decided to take one home for a real test drive. I am thinking this level of performance is a result of a 64 bit data path and the use of Sony's own digital drive ICs. They use a new approach to level adjustment that presents the full length word to the output stage at all times. No computations are used to adjust level, so no digital grain or loss of resolution occurs. The 3000ES and 5000ES are even capable of driving reference quality speakers, they are that good. While the Panasonic receiver is good, it is hard and digital sounding when compared to the Sony or a high end analog amp, almost MP3 like in it's dynamic contrast, lacking LF weight and authority. HF detail is so very clear and present without the aggressive character of the lower cost TI based amps, this may be their second most striking characteristic, right behind their ability to create an image. As a PCM digital amp, the Sony is going to be very hard to beat. It's SACD performance is not as impressive as it does not have a digital input for SACD, but for PCM, it is simply amazing. The STR-DA9000ES will support an SACD digital input from Sony's new flagship player, the SCD-XA9000ES. I have yet to hear this >$7000.00 combo, but cannot wait ! The STR-DA2/3/5000ES deliver a soundstage that is huge, with very fine localization and depth. They truly sound like a high end setup, even on very revealing speakers. The music is very much 'in the room' with you, very present, like a fine tube amp with the depth of tubes as well. It also has the control and extension of a solid state amp, everything is so very well controlled that the sense of realism is startling. The Sony ES designs reveal a level of subtle detail simply not audible in any other sub 1500.00 receiver I have heard. Listen to the PCM layer of the new Dark Side of the Moon reissue thru a Sony ES model. The vocals that are typically buried in the mix are heard with breathtaking clarity in a very 3 dimensional soundstage. The foot steps on track 3 are impressive, you not only get the familiar left to right movement, but very specific front to back placement as well. The soundstage is so deep and wide with morphing layers of sound, it is a real treat and most likely the very best most have heard this fine recording do. Take this one with you for a demo along with your favorite audience recordings. Be forewarned, a reference quality system can be brutally honest, so take several live CDRs as you may find out things about your current favorites you did not know ! The Bob Dylan reissue from Sony is also a very nice set of recordings to re experience with much improved sound. Blonde on Blonde as an SACD is every bit as good as the LP. 'All I really want to do' from the bootleg series is priceless. It is a bit raw but is a live to two track with enough real ambient information to put you back into the Philharmonic Concert Hall in 1964. Unlike the Panasonic receiver designs the new Sony MOSFET digital output stage can handle a 4 ohm load, making it capable of driving difficult planar speakers. While it is true even discounted the Sony ES amps are more pricey, their superior sound and 5 year warranty should help offset the painful effect of spending more money ! If you want to breath new life into your music collection, give these new digital designs a test drive, you will be glad you did....Doug
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so, its these amps that i'm curious about.