Well, that makes it a little easier...
Someone who likes old style "analog" sound will probably enjoy older analog recordings remastered well to CD (there are many such recordings to choose from these days) and played through a tube amp of choice best. So my answer is c).
An extreme example, but I have some old 78s that I have recorded to CD and .wav digital formats that display the unique and most distinct analog charms of these recordings in a manner that could probably only be surpassed by playing the 78s on a nicely restored Victrola. That's on my list of audio toys to acquire someday. I have tubes in my pre-amp only. And no horns in my speakers. It might not be easy in general for someone to know I am using a tube pre-amp just by listening...though the detail and articulation with just the slightest touch of warmth perhaps in the midrange might be a hint.
Someone who likes old style "analog" sound will probably enjoy older analog recordings remastered well to CD (there are many such recordings to choose from these days) and played through a tube amp of choice best. So my answer is c).
An extreme example, but I have some old 78s that I have recorded to CD and .wav digital formats that display the unique and most distinct analog charms of these recordings in a manner that could probably only be surpassed by playing the 78s on a nicely restored Victrola. That's on my list of audio toys to acquire someday. I have tubes in my pre-amp only. And no horns in my speakers. It might not be easy in general for someone to know I am using a tube pre-amp just by listening...though the detail and articulation with just the slightest touch of warmth perhaps in the midrange might be a hint.