Should I upgrade my Tubes

Rodman Gave very sensible advice

GL KT77s are great tubes, although currently I'm using a pair (I have a quad of these) of unused Sovtek KT88s I've had for a while...somehow they sound great.

@decooney - Never did try anything with less potential power than the KT88/6550, being an SPL lover and trying to squeeze as much as possible, with the lowest distortion, from my modded SLM-100s.      A relatively small, highly treated room with 93dB/2.83V speakers (w/active biamping and SS, below 80Hz, 60dB/oct) helps, but.....                                            The best presentation I’ve had, was provided by the GEs.     Glad I never owned an octet of the original Genelex or Tung-Sols.      I’d have probably been ruined for life.      Would have been nice, had the GL KT77 been available when I was modding/updating ST-70s.

I fixed it, my bad. I am totally digital streaming and I have a Codex which I guess I accidentally put in Preamp mode. Changed the setting and everything worked. Cost me 2 days of lost pleasure though.

I may punish myself (sic) by spending $ on another set of power tubes (as a back up) and enter the world of tube rolling. Any solid suggestions for listening to blues guitar, jazz and chicks singing ?

Also, do I need to be concerned about the 5 preamp tubes ?

You have one preamp tube (the middle 12AU7).      The rest of the nine-pin miniatures, comprise the front end of the Rogue’s power amp section.      If it’s sounding good; no (no worries).      Those will typically last much longer than the output tubes.       KUDOS, on finding the issue.