I hope when it is all hooked up correctly( don't forget to plug it in) that it sounds glorious.
If it doesn't...don't fret it probably needs a bunch of burn in
get a cheap cd player and run it in repeat mode for a few days, don't worry about the tubes...they need to be burned in as well.
turn it off for a few hours every day
Do it for a week! Sounds crazy but it will sound a lot better