Well, room treatment is the first obvious thing to do. It’s kind of easy, because what you do in absorption in the mid and high frequencies is very easy to understand. It’s also very easy to hear the effect straight away. So, most of the people are doing that in their home cinemas. It’s a bit more difficult to understand what’s happening in the lower frequencies. Most of us don’t know how sound waves spread and radiate in a room. We can’t see them, they’re invisible. We don’t know so much about room nodes, first wave and second wave…bouncing back from the walls. How these interact and overlap.
It’s easier to understand mid and high frequencies and do something about it then low frequencies. That means that you easily forget about how to correct these things. It’s important for the bass experience to do something right regarding room acoustics. Here’s where room calibration really helps. Helping with the invisible stuff. That’s in the lower frequencies.