it's a kit, you have to build it, they don't sell assembled versions. But it can be a lot of fun.
Runs pretty quiet using DC, but the fun thing is that it uses both tube and transistor, and you can mix between any amount of tube or transistor type preamp.
Like I said I'm NOT SURE how this one rates, but I've had one for a while and it's a lot of fun and you get a range of sounds from clean transistor to clean tube or to exaggerated tube sound. Or anything inbetween.
Just something to check out while we're waiting for posts from other members who know more about preamps than I do. (I'm curious too about preamps, wondering what others have tried).
(PS I just ordered a T1, it's still shipping and is my first hifimediy board, so haven't tried the preamp on these boards yet sorry)