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In the Forum: Melquiades Amplifier
In the Thread: Valve Preamplifier for Macondo/DSET
Post Subject: More thoughts...Posted by anthony on: 8/16/2020
 Romy the Cat wrote:


Another a very valid thing to try is to see of the same difference with the same recordings happens with different DACs, preamps the you will take care of the absolute phase.


To date, my listening has been with my favourite dac, the Phasure NOS1a.  The other dacs here don't really compare, and if listening with digital I will always go Phasure otherwise for background I might stream Tidal from my work computer via a Focusrite Scarlett 2i2, which is quite befuddled compared to the more expensive dac.

 Romy the Cat wrote:


You see, different DACs topology have different post DAC filters and they send different amount and different type of UHF into the upstream chain. Your 10Y is UHF limited and in a way acts as low pass filter, which is not necessarily a bad thing. Placette is wide open monster in UHF, in fact it might run a video signal with is very good for it but not necessarily good for music.  I in a past observe a phenomenon that Placette was very much picky to what I used in DAC output filters. I have some CDs that if I play them with Bidat vs. Lavry Gold DACs they sound like very much different recordings and the difference is VERY different than a typical delta between Bidat vs. Lavry. If do the same experiment with a different preamp then the difference will be between the DACs but in completely different way. In most of the cases TLO-Lavry Gold with Placette has too much “resolution” and too ferocious dynamics that is superbly impressive to thrill audiophiles but not so musical and I tend do not use this combination.


The Phasure dac is completely filterless...nothing, nada, zip.  The digital filter is applied in the computer software and sent to the dac in 32/768 which just plays the file NOS without additional filtering at all.  As such the Phasure dac is wide open frequency wise.  Plus the BNC cables I use are video spec and have something like 1dB attenuation over 100m at 6GHz and they are not filtering any UHF either.
"Ferocious dynamics" is not something that I am associating with the sound that I am getting here from this dac, and sometimes I might correlate that sort of sound to washed out or white mids with an emphasis on highs, but the sound here seems very well balanced.

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