If a room sucks you'll never get it right. Even with lots of room acoustic devices (bass traps, diffusors). If the room is quite good (proper acoustic characteristics), then you can optimize it further.
Caveat: room dimensions don't guarantee that you'll have good acoustics, even if you follow the golden ratio (whatsoever) rule.
Chris
Caveat: room dimensions don't guarantee that you'll have good acoustics, even if you follow the golden ratio (whatsoever) rule.
Chris