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In the Forum: Melquiades Amplifier
In the Thread: Valve Preamplifier for Macondo/DSET
Post Subject: It was all in there, somewherePosted by anthony on: 4/21/2019
 Romy the Cat wrote:
   
Oh, good, why did not you tall it before. How the hell can you listen if it you DAC outputs 1V?! No wonder you have no volume. Also if you have no voluble you do not “get” one of the most advanced feature of multi-amp topology multiplied with one of the most advanced feature of Milq design: an ability to absolutely effortlessly to walk over dynamic contracts, particularly at high volumes. Most of the amps out there change sound as volume rise, not multy-amped Milq. This is all together a big subject that requires a separate explanation. Anyhow, with 1V from your front end you are nowhere. My front ends have 3.1V at 0dB digital. Many of Milq’s ideas were very much formed around the input Milq tube that ruin with 4.5V bias and that can naturally (with no feedback injected into cathode as Lamm does for instance running 12AX7) can handle the whole input voltage swing. My phonostage pushed over 4.5V and it will drive the Mil on A2 but it will be at the volume where the wind will be flying out on my listening room. With 3-4V at input we still at the perfect window where the driver tube not stressed by input voltage and the output tube is still not clipped by power:
 
http://www.GoodSoundClub.com/TreeItem.aspx?PostID=6057
 
I do not know what your fav DAC is but if it is operational amplifier basedDAC then you can easily get more gains out of it by lowering the op-amp feedback.



With DSET, I do not bother to listen with that dac and I stream approximately 2VRMS from a soundcard (Focusrite Scarlett 2i2) attached to my work computer.  It is better.  When I really want some volume I add a SUT but of course this is not an optimal solution.  As I mentioned in my earlier post to Rowuk, my main dac has has zero feedback at output but the IV stage can be "stacked" for more output:  I am tempted to try this.  The output stage will drive loads of current and the manufacturer thinks I am mad running it through a preamp.

Thanks for this information Romy.  3V-4V output is what I need:  I'll aim for 4V.  

Oh, and believe me that in my Macondo's current state I hear the Milq absolutely walking over dynamic contrasts even at the volume I am able to muster with the SUT, it is extraordinary, and will only improve with the UB horn.

 Romy the Cat wrote:
   
Anthony, I do understand all of it but the sentient you expressed has, in my view, a self-defeating and self-limiting fallacy. A desire to have “good sound” is abstract and never fulfilling. It is not different from the famous emperor’s comment that Mozart’s music has too many notes. Your parley in audio as a substitution for mid-life crisis is not something that I have problem with. I do have a problem that very frequently in audio people get taken by ability render differences (by building or buying)   and do not recognize that they keep moving irrelatively- latitudinal or lateral. A true progress in audio and better audio come with observation of system owner longitudinal or amplitude progress. I do not see in anything you say, at least publicly, any factoring of any listening objective and this is a bit concern you. Not that I worry about you too much, you do not need  my worry, but I also know a lot about machine- humans interaction, in this case machine are audio methods.  I do not want to bother you with all of it but I juts share you with my presupposition that you might take under consideration or might discard it as a stupid nuisance. If after a period of time listening you playback you detect that you move in your listening preference from whatever you are listening to Bach, Beethoven and perhaps Brahms then your playback “works” probably and you are getting “good sound”. If during you practicing audio your listening inclination do not move altimetry toward to Bach then you need to start changing tubes, voltages, cartridges, cable elevators etc….


I've not explored Bach too much yet.  Am still exploring several others whose works have piqued my interest when heard on the radio and elsewhere.  Not having any classical music in the house during my childhood has limited my field of view in this regard but interest is ever expanding...I am sure Bach is not going anywhere and I will get to him when the time is right.  Hearing something I enjoy and then finding the individual performances that tickle my sensibilities and then realising that some performances of the same work (from the group of performances that I admire) are more suitable depending on my particular state of mind is so much more rigorous and complicated than blindly sticking on some rock or pop that still sounds exactly the same from the day it was released because it is only ever really performed by the one group.  I find that with classical music that due to numerous interpretations of any given piece there is more work to be done by the listener and more to be learned and gained thinking and exploring what interests you.  I'm certainly still learning...

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