The Nuis Fidelity is uppoosed to be Music Diretc's best selling accessory.I find that interesting.I would think that if you were going ad wramth (upper hamonic dsitortion-the distortion we like) buit would want the signal to not have unneeded articfacts ADDED to sound chain.Makes more sense that one would want it to be in pre section.Tubes are good at adding harmonics while changing voltage but father down the line and all tube system as you know has weaknesses like high end roll off and weaker bass (in general) then solid state designs.That's why many want a glass pre anmd ss amp.But why not it happen while it's accomplishing a function (pre-amplification).same thing makes me wonder about CD player "upgrades" that include tubes.But couldn't the need for this mean that the design or Dto A section isn't as good sounding as it shopuld be?My own thinking is give the warmth in the pre section or by feeding through a integrated amps added warmth.Up till that point I would want the digital to be as accurate and clean as possible.Maybe I am wrong in this intuitive fealing that it does not matter where it's added as long as it's added.But I find it hard to believe that it will, "increase the soundstage depth,improve imaging ,or deepen bass" (as the ad for the MF buffer say's if does) if these qualities are not there allready.Don't get me wrong I use a tube (EAR 834) Intgerated.But where and how the tubnes are added in my mind has to sound better inroduced one way or another and my guess it's better in primary function like like pre or main amplification.
Chazzbo
Chazzbo