Originally Posted by dmusoke
1. Test data shows no power supply noise injected into the analog circuits. if there was any, it was well below the background noise of the player.
2. Improve the clocking? The ESS dacs have excellent jitter tolerance while hardly producing any jitter.
3. Better bypassing of the ESS dac? Again, if it was inadequate, power supply noise and/or other forms of noise junk (spikes?) would have been shown up in the test plots. None ever did. Noise is
electrical in nature and not invisible.
4. As for the output cap, the one used in the 105 was of very high quality (i.e. very low distortion cap with a very low voltage coefficient). I'm assuming the same type of cap or better is used in the
205. Besides the output cap is needed to block DC into the inputs of preamps and amplifiers, which is a good thing.
5. Curious, how is the AVM60 the solution to the limitations you mentioned above?
As I said, many people find the sound from this unit sufficiently good or excellent already, and there's no point arguing whether you could hear the difference or not. I certainly find the overall 205 package very appealing and purchased it myself.
Test data are of course very important but often do not distinguish between great sounding and excellent audio equipment.
For pure two channel use, and a high-resolution system, with modern high resolution recordings, I find that a dedicated DAC such as a Auralic Vega DAC sounds much better than the universal OPPO. This is due to many factors that are better in the dedicated DAC, including better clocking, reclocking, power supplies, RF noise avoidance, jitter avoidance, bypassing, better analog output circuitry etc.
One problem with having a video player etc. in the box is that you get a lot of high frequency and RF noise introduced.
3. The SABRE DAC is using high-frequency current pulses to assemble the final output voltage or current. Therefore, it does benefit from increased local bypassing as I have demonstrated myself on a 105. The 205 actually uses four times higher current...
upthread, someone else discussed the benefits of improved bypassing on the analog parts of the 205 analog stereo board.
4. You're wrong if you think it is desirable to send your musical signals through a polarized electrolytic capacitor. This electrolytic cap is generally not needed and can simply be bypassed or omitted. This will remove some of the remaining grain on female voice especially. I have also demonstrated this previously on a 105.
5. I thought it would be apparent that the AVM has room correction, DTS-X, and Dolby atmos decoding...
for two channel use such as SACD, DSD , or 96/24 etc I believe that the OPPO is probably higher resolution, but it would benefit from some modifications.
At the end of the day, I encourage you to enjoy your equipment and listen to the music.
Since you specifically asked
how one could improve the unit, I made you a list of some potential improvements that could be considered.