I am trying to find more infos on Sony 's all-digital amplification AV receivers (AVD-S50ES, AVD-C70ES). I checked the Crutchield www site, but they don't have much data on the new amplifier technology. I am interested in these two new machines because they might be the best SACD playback machines: the signal is converted to analog at the speaker terminals. The amplifier might do his job in DSD (Sony's digital high resolution sound format). If this is true, then be normal redbook CD's are probably upsampled to DSD. Thanks in advance for any links or informations. Bruno ------------------ Edited January 19th I forgot to write that theses are receiver/DVD/SACD combos. I also found a Sony press release, but unfortunately without much details: SONY BRIDGES ADVANCED PERFORMANCE WITH LIFESTYLE CONVENIENCE IN NEW INTEGRATED DIGITAL A/V RECEIVERS Further search lead me to this PDF product information from which I found: " The Ultimate Home Theater Solution From signal to amplification, Sony has achieved a quantum leap in technology, the digital handshake. Traditionally once signal is output from a SACD, DVD, or CD processing occurs in the digital domain where the signal is converted back to analog to be amplified. It is within this process where noise can be introduced into the signal. However, with the new Digital Drive Amplifier the signal to amplification, the process occurs entirely in the digital domain. This allows for greater linearity, improved signal to noise ratio and lower signal distortion."