Magners Irish Cider actually. To be sure!!!
Just started wiring everything in which is taking an age. However, I've just called the cavalry in the shape of a young lad who's studying sound engineering in college. Should be round in about an hour.
Since we're on the subject of mancaves, I did something similar to a single car garage (40' x 12.5') on the side of my main house. I wanted a place for my motorcycle but it ended up also being a home theater and bass jamming area (plus a nice place to escape from the wife)