So, I'm new to tubes, but I'll be replacing the 12AX7 tubes in my Aphex 107 preamp with 12AT7's. I have read on here that they were originally supposed to be in there and the unit performs better with them.

ART MPA gold, not so great stock tubes. I've heard putting in some new ones can make a big difference, but what kind?

We might as well know this.

audio preamps, guitar and bass amps...

Who are the best tube manufacturers?
Who do we buy them from?

Why are there differences?

Well I am starting to experience great volume loss on the clean channel of my Peavey xxx. It isnn't constant however. It is also cutting out on all channels and I believe this is because of my power tubes which have never been changed in the past few years since I bought it new. I know the preamp tubes are fine as I replaced them about a year ago.

I own 2 of this units. I like them they are good gear for the price.

Does any of you recommend some specific tube brand and model that could upgrade the sound?

And now a general tube question since this is my first tube pre. Ho often do I need to replace tubes?

Thank you in advance.
eFe

on stuff other than the hi fi audiophile gear, would these tubes be amazing sounding? ie. guitar/bass amps, preamps, dynamic processing.

Hey Hey

So I turn up my Marshall JCM 2000 TSL 60 Watt stack and as the master volume approaches face-peeling-off volume it seems to struggle for power and the tone goes all dull and sh*ttay. Time for new tubes? It's fine at moderate volume, just as you push it harder it goes softer and weaker. Any tube recomendations? 6 years old, used-not too often.

Cheers

i've been thinking about saving myself some money by replacing the stock 12AX7 tube inside my $80 preamp with a better tube. (i think i ran across the bnb tubes site in one of these forums).

is this something slightly common? would it be worth it? would i get myself a more pleasing sound or a bad electrical shock?

Anyone ?

http://www.trilliumsound.com/SizeMatter.jpg

I have a lovely Pendulum to cover my tube pre needs. I don't have a tube mic, however. The cheap ones I've auditioned have a bit of gauze over the picture, but I assume good ones can sound spectacular and clear. Here's question 1. All things being equal which I know they are not, will a nice tube pre obviate a tube mic.