Guys, I'm planning on building a dedicated listening room based on the Sierra Towers. My initial thought is to have a Golden Cuboid design as recommended on Cardas' website. This seems ideal not only for serious music listening but also for the inclusion of HT speakers around the room.

room_setup_diagram_c.jpg

1) How big is the ideal cuboid room for using the Towers without a sub? The speakers as seen from the pic will be quite a bit away from the walls. My initial plan is front wall 18' x 29.5' sides. Any other ideas on the dimensions?

2) The room will be part of a newly designed house so I can freely put it in the basement or the highest floor. What would be the ideal location? The room's interior will be designed and treated by a professional audio room contractor but I would still need to decide on the size and location.

Thanks guys!