| To the OP:
Look for a non-square room. To take it even further, make sure none of the dimensions are even multiples of each other, ie, 8' ceilings and an 8'x16' room.
See how the empty room sounds. If you can, bring an acoustic guitar or something to see how it sounds.
Preferably, the corners are clear (ie, no doors or windows) so you can add bass trapping.
Also, see how airtight the room is. Close the door and see what you can hear outside the room. |