I used to have a tube cdp, tube preamp, and SS amp that sounded really good. I changed to a different tube cdp, passive pre, and the same amp and it sounds awesome.
First I changed from a SF Line 3 SE to Placette Passive and the transparency and overall musicality improved dramatically. No dozen tubes to replace in the Passive and the initial cost was far less. The sound was further improved when I replaced the SFCD-1 with a Granite Audio 657 tube cd player.
The output level from the SFCD-1 was good with the passive, but the variable output on the tube stage of the 657 is better. I never have tried the cdp direct to amp, because there would be no remote for volume.
First I changed from a SF Line 3 SE to Placette Passive and the transparency and overall musicality improved dramatically. No dozen tubes to replace in the Passive and the initial cost was far less. The sound was further improved when I replaced the SFCD-1 with a Granite Audio 657 tube cd player.
The output level from the SFCD-1 was good with the passive, but the variable output on the tube stage of the 657 is better. I never have tried the cdp direct to amp, because there would be no remote for volume.