The property has a large driveway and we live in a climate where we don’t need to park cars in garage. Wife says go for making it my man cave since I need a room where the little one can’t get to any of my stuff. Garage is about 20x20x12 with plenty of grounded wall outlets
Any advice is appreciated !
First place to start is the figure out the best dimensions and shape of the room. Everything else is secondary.
Typically a square room is terrible because any standing waves will be doubled. Perhaps add a secondary “room” parallel to the existing garage door that would serve as a storage area for lawn equipment, bikes, etc. and would also change the listening room dimensions to something conducive to good sound. You will also need to probably adjust the ceiling height or modify it to have a slope or varying heights.
By the way, I am totally jealous.