The recording itself sets the parameters and your system can only convey it, or distort it, as the case may be. Being that, I don't feel you have to go the tube route to get that natural and neutral sound. It can't hurt but its not necessary.
Very good SS can sound fairly neutral and uninspiring but it all depends on the recording and the quality of the playback gear.
I've had friends bring over the same old CDs, hoping to hear something different with a change in gear and every time, within seconds of play, I can hear that same old recording's limits and yet they sit and listen, waiting for that magic moment when it will finally sound decent. It never does.
Very good SS can sound fairly neutral and uninspiring but it all depends on the recording and the quality of the playback gear.
I've had friends bring over the same old CDs, hoping to hear something different with a change in gear and every time, within seconds of play, I can hear that same old recording's limits and yet they sit and listen, waiting for that magic moment when it will finally sound decent. It never does.