I believe you have neutrality and transparency confused. I think Onhwy61's definition of transparency is more correct. I've heard good tube gears that obviously rolloff the frequency extremes, but sound more transparent, and thus I "see" the real instruments much better than cheap solidstate gears. And those solidstate gears are probably more neutral as measured from DC-to-daylight.
I definitely believe low distortion is the key to transparency.
I definitely believe low distortion is the key to transparency.