Recommend Audio Circle's own GIK brand of acoustical treatments (and advice). But we need to know what size the room is and what materials the floor, walls, and ceiling are made of first.
Regarding power conditioners...
1.) Why do you think you need power conditioning?
2.) Does sound quality noticeably change throughout the day and night?
3.) Describe where do you live and what is the local utility distribution system (and major customers) is like.
4.) Can you borrow a conditioner before purchase to make sure it would help?
