Upgrade...Sounds great...Goes away

Yes! Now I have something else to change/improve to move towards a sound that I am happier with. Sometimes it's change sometimes it's improvement and sometimes it's both. Adding vibration removing devise(Navcom pucks) is a change that led to an improvement in detail equaling cleaner leading edges throughout the spectrum equaling more detail. Now that there is more detail I can hear more and want to change something that I wasn't aware of before. Isn't this one example of how our systems evolve?

Samhar- YES, BUT: You're just imaging the improvement. You know: The (ubiquitous/inevitable/worthless) 'Placebo-Babble', er... I mean, 'Placebo-Effect'. KUDOS on your experimentation. Don't give up the Quest.

I know that, but I like to pretend that different tubes sound different and it makes me feel like I'm donating to a good cause when I give to the poor tube dealers. BTW I'm running Sieman El88CC's in my pre and loving them. My next fantasy CCa's, WOW this is as good as sand box therapy!!!!

Samhar- You must seek the same gratification as I, supporting those poor tube dealers, even buying the same tubes. Be certain the CCa's you purchase are pre-'68. Happy listening!! =8^)

Thanks you too!!!! [:^)