PROJECT IV: PART 2 / fast update / benefits from Dual (+12V-0–12V) DC
fast update: as my original plan (using the massive Cyrus-PSX-talema transformer (see posts before) + some AC-DC rectifier for dual-DC)) is now suddenly “obsolete” cause i´ve got no voltage output at the end of the chain (don´t know why at present) i used the power supply for the video-section (+12V-0V–12V) from the BDP9500 and my green ES9038Q2M for finally dual DC power supply..and first impressions ?
1.for the dual DC-thing: absolutely more exact left/right->absolutely better “channel separation” higher S/N i guess too, more “lively”..i knew and read a lot about it, and indeed, it has a great impact of the output (want not to go back to single DC) +
2.the high-class power-supply chain (from the BDP9500): absolutely lower “noise-floor”; everything more “lively/airier”, absolutely higher S/N-ratio (is absolutely clear->if u remove the background-noise, everything will get more in the “foreground” and is more clear + lively)..
i miss a little bit the “attack” which i got more, the more voltage i put in (IMO) and as said, the manufacturer says “..dual 15V (+15V-0V–15V)” and have now only 12V; will look for a way to solve this..
another result from this 2 “optimizations” is an absolute greater “presence” in the mids/vocals (here on Mission-speaker)..by that i´ve got the feel that i have to put the volume on the amplifier a little bit “up”, to get to the “sweet spot”->guess a good alternative could also be to reduce the DAC-volume via the onboard/onchip-volume-control via some poti to 90%-95% (and turn the amplifier up)->had this first checked with the ES9028Q2M some years ago 😉 -> http://essabre-90xx-rpi.sfb2.com/?p=440 and the result was fine..(the disadvantage is maybe a little bit worser SQ (because of the “altering”); have “to balance/check” it out)
Conclusion: with these 2 “optimizations” you get some really interesting new ways/turns concerning the sound/character !! have now to adopt it in further testing out; dual DC + high quality power supply (+less EMI-noise +such)->to recommend !! 😉
greets for now (+ more to come) !! 😉