Spending a lot of money on a high-end system and still not getting the best sound? This is often due to the room's acoustics. Especially in rooms with a lot of bare, hard walls, problems arise: direct sound reflection (flutter) and significant reverb. Furthermore, frequencies can reinforce or attenuate each other, creating unwanted effects. You might notice this because you only get good sound at low volumes, while at higher volumes, the bass dominates. You might also hear a distinct hum or flutter effect.