Different Tubes and general purpose?

Wow, way down here..  I haven't used your particular amp.  But I have heard The 805. quite a few times.. From the stock tubes he went to
RCA and Amperx (vintage) both improved the bass and low mids. Amprex better all round. He used Sylvania too. A lot more sparkle to that valve. Better highs for sure. NOT BRIGHT.. Tame sylvanias with good copper wire...

I have used countless others. Mac. VTL, CJ, DIY, ect.  Matched signal tubes can be quit a sonic nugget, if, they are not matched well to begin with, or have degraded.  L/R.

The big tubes, Unless there is a problem, USE them..KT120 hefty valve.

Again matched tubes go a long way on how a STEREO amp sounds make no mistake about it.. depth, clarity and cleaner phantom speaker resolution. 

Regards 

I have a Primaluna HP Integrated.  I've rolled a bunch of tubes in there.  Contrary to MillerCarbon I find a definite difference in tubes.  I've run the KT120s in mine, and bottom line, I don't any more.  I found them to have a "glare" on the midrange that I could not "tweak" away.  I noticed it on clear, well-recorded vocals where I could hear a "fuzzy" aura around the vocals.  Check around, and you'll see that a lot of users of KT120 report this issue.

I moved to KT150, and that glare went away.  They sound punchy and powerful with none of the glare.  I had those for about 2 years, but I'm now running a new favorite, TungSol 7581A.  If your amp will run them, I'd say give it a try.  They are under $30 each, so not too expensive.  I've been running them about 5 to 6 months now, and my system sounds the best it ever has (although this isn't the only adjustment I've made in that time).  I will soon go back to the KT150s to compare, but I'm loving what these tubes have done.

But, Miller is blathering about his favorite fuse vendor.  I won't argue whether a fuse can make a [slight] difference or not.  When I tried an aftermarket fuse, there was no discernible difference.  That was MY experience.  But, there is absolutely no way that a fuse can have a bigger impact than rolling tubes.  Rolling fuses would be low on my list of improvements to explore first.  Look at Miller's system on AGon, and note that he isn't even running original tubes.  They have a sticker on them from theTubeStore.  They are still KT88s, but I think those are the only tubes that amp can run.

I agree that there are some tweaks that can make it all come together, but IME, you are better to start from a solid foundation before you start tweaking too much.  Adjust your room, tune everything thoroughly, get it to sound good.  Then, tweak if you want.  But, tweaks won't fix a foundational problem, which you may have with the stock KT120s.  You might find improvement with some NOS KT88s or KT120s.  Google "tube rolling" and Line Magnetic 501ia to find what some others have done.  I don't know if you can run the 7581As, but worth a try if you can.  Some different driver tubes and power tubes will make a very noticeable difference in how it all sounds.

Absolutely absurd dismissing that tubes can make a difference while gushing over a fuse. I’ve rolled tubes and I’ve tried Synergistic fuses and other products from SR. All have made a difference but I have to say, a pair of NOS 7308 Mullards from Brent Jessee moved the needle so much more in my preamp than dropping a SR fuse in the same piece of equipment. We shouldn’t be preaching "the only thing that matters is what you hear with your own ears" while dismissing what folks hear with their own ears! This type of cognitive dissonance is really getting old. We are all here to share opinions but self righteous behavior has no place here...it's unhealthy and unkind.

Didn't dismiss. Didn't gush. Merely pointed out, quite correctly, where each is on the spectrum of performance options.

When you have to resort to misrepresenting (ie, lying about) the other fellow you know for sure you have lost.

Another hack:

But, Miller is blathering about his favorite fuse vendor.

Blather? That’ll be the day. Point out the blather. If you can. If not then guess what? You are the one blathering.

I won’t argue whether a fuse can make a [slight] difference or not.

I see. So what will you do, then?

When I tried an aftermarket fuse, there was no discernible difference.

"An" after market fuse? Really? Which one? Sounds to me like you’re trying to call me out without having the integrity to admit you have no idea what you’re talking about, because you’ve never even heard a SR Orange Fuse. Right? More blather.

That was MY experience.

Right. Your experience with.... what? You haven’t said. More blather.

But, there is absolutely no way that a fuse can have a bigger impact than rolling tubes.

Based on... what again? Oh yeah. Your experience with "an" aftermarket fuse! Brilliant!

Rolling fuses would be low on my list of improvements to explore first.

Based on.... your experience with.... ?

Look at Miller’s system on AGon, and note that he isn’t even running original tubes.

OMG! Not even aware tubes do wear out and need to be replaced from time to time! Let me fill you in: even the original manufacturers tubes do indeed wear out and need to be replaced. More learning, less blathering, okay?

They have a sticker on them from theTubeStore.

Thank you, Inspector Clouseau.

They are still KT88s, but I think those are the only tubes that amp can run.

Correct. A dazzling display of blather.