I put this in a cheap Behringer mic preamp.

A good preamp tube, a little bright for my taste and lacking in bottom end

Awesome preamp tubes

It is a high gain preamp tube that works well in V1 posistion

I use this amp mainly in the Modern UK preamp setting for most of the music I play

Nice quiet preamp tube

The clean channel doesn't break up as early as with the stock tubes (which is what the lead channel is for anyway)

used in an ART Tube MP Preamp, works and sounds really nice, as good as or better than the JJ it replaced