As an FYI my best results with Boom are when I have it set no more than 70%, and regular volume no more than 80% or so. This is clear and not distorted, yet still noticeably louder than having just the regular volume at 100%. Never use it for music. But for video it's great to have. I sometimes throw the Air on the breakfast bar streaming news in the morning as I get coffee going in in the morning. 'Course I do that with the iPad too.
I'm going to try Air Display again now though with Boom not running. It really does pair the MB Air and iPad together nicely. Too nice not to try again.