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The Shiit preamp has lower output impedance than the NAD DAC going directly to your Prima Luna integrated. It is like having a buffer, either SS or tube to get more current drive to your integrated. The NAD alone runs out of gas as far as the Prima Luna is concerned.
This is not uncommon. Most DAC's have 50-100 ohms output impedance.
If you use a really low capacitance interconnects, like the ones that I used to make (3.9pF/foot), then this is less of a problem, however some amps just need more current to sound good.
The Shiit preamp has lower output impedance than the NAD DAC going directly to your Prima Luna integrated.Your saying the:
Nad M51 with (4.7v xlr) (2.4v se) output at 180ohm output impedance, is not a great match into the PL integrated at 100kohm input impedance that only needs only 0.36v input for full wattage output??
And as far as the cable capacitance goes, even if they were 100pF per ft at 2mts 600pF this with the 180ohm output of the M51 is still only -3dB at 147khz!! hardly what I call rolling off the highs!! Stop selling your cables!
Please give your electronic math reasoning behind both of these?? I’m very intrigued!
I think that you need to ask yourself what the goal is. In your last thread I got the feeling that what I would consider a digital sound is not your cup of tea, and that you preferred something that reminded you more of your analog system. To me it seems that a tube based system and perhaps an older type of DAC sound might be the key. I would consider a Border Patrol DAC, which uses an ancient DAC chip with a newer implementation, and whatever tubed electronics that work well with your speakers
You're (not your) saying the:
That is what I'm saying. The 10K input impedance is just a resistor. Has everything to do with the dynamic response of the active input device, a tube in this case. This is where more drive current is needed. It's the input impedance of the tube circuit that is important here, not the resistor. Dynamic response is a different animal than steady-state, which is your .36V sensitivity spec.
@mahler123, Yes, my objective was to push my digital front end up a bit (better it so I could listen longer). The reason I want to do that is I really like exploring the catalog on Tidal before I buy vinyl, which I'm not yet familiar. Some have said I should just stick with vinyl but that misses the objective--I cannot just buy records to no end. I have to lay out the cash and just as important I have to store them. I don't want a 10,000 album collection. I like to listen to each album in my collection.
So I think the situation is much much better with the Freya feeding the Primaluna with my DAC feed than the DAC direct to the Primaluna. But, and it's a big BUT, this sounds better, not ideal. I can live with it.
I spent hours last night comparing the best recordings I could find digitally that are also in my vinyl collection, with the criteria that they had to be favorites or recordings I really like and knew very well. Vinyl won out.
Tonight I'm listening to digital because I'm exhausted and don't have much time. I had my kid all day and the wife is doing bed time, so I wanted to keep it simple and just listen and not have to get up much to deal with records. Well, digital is fine, just not as engaging.
The holographic picture I get with vinyl and my cart/preamp is just intoxicating when things are right.
You have not address my questions just briefly skirted around one of them.
This is what you said was the reason the Schiit was better than going direct, and I called you on it. As none are at any disadvantage impedance wise going into the 100kohm input impedance of the Prima Luna.
" The Shiit preamp has lower output impedance than the NAD DAC going directly to your Prima Luna integrated."
This is not correct!
And as for the interconnect capacitance you quoted, way out there in voodoo land I'm afraid as I proved with the math.