Is a SUT needed?
Dear @bobsdevices : As you know I posted almost in all threads that my main target is to stay: TRUER TO THE RECORDING and my audio system " spins " around that target and how achieve it ( nearer as I can. ) and in the analog alternative case we have to take extremely care to preserves the cartridge signal information preserves its " full " integrity, with out this premises we can’t achieve that main target. Can we preserves the full integrity cartridge information?, sure we can’t do it. What we can do it is to stay the nearest we can and that’s ALL ! !. My system handles the cartridge signal through a PhonoLinepreamp ( no separates. Output signal goes directly to the amps. ) ) unit designed with some of these characteristics: fully diferential/balanced dual mono class A non-feedback, dual mono separate/external power supply, no single wire inernally from where the signal travels, input/output connectors direct soldered to the main four layers circuit boards, two totally separated dual mono MC and MM stages where the MC one active devices are bipolars and Mosfets for the MM stage, passive RIAA with tigthy passive devices tolerances ( matched, truly matched. ), no SUT for gain only active devices, every stage fully discrete, no impedance/gain switches or the like and obviously no single tube there or every where in my system. All those and many other characteristics in that unit permits to have a RIAA eq. deviation of only 0.012 dbs and not only this but when you make RIAA measurements and print the chart/diagram you can’t distinguish the left from the rigth channel RIAA measurements because there is no deviation in between ( as in every phono stage no matters its price tag. ), you see only a line for both channels from 20hz to 20khz. This kind of performance levels is not only through the RIAA response but all the whole Phonolinepreamp channels response/performance is the same. That’s the quality levels I’m talking here and everywhere. Way different on your or other gentlemans approach and that’s why I know for sure a SUT can’t not even be nearer to my unit. Noise and distortion levels in my unit?, well you can’t believe it. Now, as I said in this thread a SUT sounds very good but with other kind of " distortion " levels. I own several SUTs and I like it when I use it but I like it more when are out of the signal. For many people and phono stage manufacturers a SUT is a must and is the lower price solution, we have not many choices to achieve something as my unit because that will be extremely extremely expensive. Regards and enjoy the MUSIC NOT DISTORTIONS, R. |
Dear @lewm : You submit wrong because exist those measurements tools to make that. Even the top of its line manufacturer you know very well because modified your unit measures 0.07 db. You have not very good memory about but I posted twice ( along few years.) that RIAA chart where in one of those ocassions you ask to me how was the response over the limits of that chart: 8hz to 40khz and I answered to you that the chart only showed RIAA frequency response and its deviations ( the unit frequency response goes from 0hz to over 1 Mhz. ) and you ask about because in the chart the response was totally flat not only between 20hz to 20khz that's the RIAA requisit but over that 8hz to 40khz and if I remember ( because I don't have in hand now. ) the deviation on what you seen was 0.015dbs and this number improved over up-grades. Additional characteristics of that unit is that's fully regulated input to output and that the cartridge signal pass only for two discrete gain phono stages. Btw, exist on other 6 gentlemans that like me are lucky enough to own it. As fact some other gentlemans that post here and in other internet audio forums ( including a very well regarded proffesional reviewer. ) and some of them ( I know this. ) that even had the opportunity to lisented the unit in its own system losted the opportunity to buy that unit for true " penauts " and prefered another way to go. Anyway, the important issue is that main target: stay truer to the recording where as the TT/tonearm and each link in the system as the phonolinepreamp is critical an important. All depends which is each one of us home audio system main target. Regards and enjoy the MUSIC NOT DISTORTIONS, R. |
Dear friends: Look what I'm talking about and see why is so important the Phonolinepreamp: https://www.stereophile.com/content/shindo-aurieges-equalizer-amplifier-measurements https://www.stereophile.com/content/abbingdon-music-research-ph-77-phono-equaliser-measurements https://www.stereophile.com/content/vitus-audio-mp-p201-masterpiece-series-phono-preamplifier-measur... https://www.stereophile.com/content/aesthetix-rhea-phono-preamplifier-measurements Btw, @lewm in that ocassion along the chart of the unit I own were the the charts of the Halcro and Dartzeel phonolinepreamps too where both was not even close. Dartzeel was " terrible ". Here that Vitus has a price tag of 60K big dollars and this LAMM set you back around 75K+ and you need additional IC cables to connect it to the LAMM line stage: http://www.lammindustries.com/PRODUCTS/LP1spec.html Regards and enjoy the MUSIC NOT DISTORTIONS, R |
