Tube Amp, Preamp upgrades -- what did you do that improved your units?

Major auditory gripe is that I listen to internet radio or Qobuz and the recording is what seems to change the listening experience!
ya can’t win!

My internet provider can only transmit what they get I assume! Mostly MP3 files!
besides I wonder if one can fully hear the difference between the various sample and bit rates ?????

I used to be v picky - loved the hi technology 

now , audio is a masker for tinnitus!

la vida es sueno!

As long as PSA is below 5 auditory distortion is a pleasure!

Thanks folks for the suggestions for foam panels, equalizers, rugs, new speakers, etc. I'm sure there's a wine to drink along with the listening, too. Still, I'm really asking a very narrow question here.

That said, it is a free country and typing is therapeutic.

Thanks, SNS. Spaciousness…the final frontier. Yes! I will likely do only caps. Looking at used market, changing caps seems minimally controversial to buyers. That said, I'm looking on keeping these amps for quite a while.

yes, Davis Family vineyards, rotgut Syrah. Pinot for guests.
The Cardas binding posts are awesome and can provide gas tight connection…

I love the smell of solder in the morning