Originally Posted by AustinJerry
^ Bass response looks pretty flat. Waterfall looks decent. The frequency response graphs have some pretty severe dips, which you should probably try to identify. Look at room dimensions and modes. You might be able to smooth the FR out by moving the mains either closer together or further apart.
Great suggestion, Jerry. I did experiment with moving the speakers closer together once, and it didn't seem to make much difference. But I will double check. I was just thinking that my couch could come up another foot or so as well. The room dimensions are a little hard to analyze, I think, Since the room is basically a square but with a small bathroom size chunk taken out of the corner and then the ceiling is slanted at a fairly steep angle.
Originally Posted by steveting99
I had a similar issue in the 100Hz to 300Hz frequency response using Audyssey MultiEQ. When up-grading to Audyssey XT32, the correction filters did a much better job. See the frequency response graphs for the center channel + sub below. Speaker make and model is KEF E301c. The sub is Rythmik F12G. The Main Listening Position (MLP) hasn't changed. The only change was the receiver that went from Audyssey MultiEQ to XT32.
Good to hear! I've read that many informed people feel XT32 is a big upgrade over XT. I've definitely found myself occasionally glancing at refurbished receiver prices.
Originally Posted by artur9
I intend to reduce the distortion by crossing over higher and doing more aggressive bass management. Just need some measuring time.
I haven’t looked too much at distortion graphs yet. I wasn’t very clear, but I mostly just included that graph since I thought it was so strange how the bass goes down and then so far back up at 40 Hz. It seems so different than most of the FR graphs I’ve seen. I guess I was just worried that I had ANOTHER problem with my mic or something. Everything else seems pretty consistent and normal, so perhaps this is just how the it measures. Perhaps this explains why Audyssey keeps detecting my mains as “full range.”
Originally Posted by markus767
Probably not a lot of ringing. You always have to look at the data with different window settings to get a better understanding because there's always a trade-off between frequency and time resolution.
What we see below 50Hz might just be noise. Take another measurement exactly at the same position. If the shape of the ridges changes then it's noise.
The peak at 120Hz is modal and should be addressed.
When you say noise do you mean background noise? Like a fridge in the next room or traffic or something?
About addressing the peak at 120 Hz, the first thing I will try is moving the mains and MLP around as much as I am able to. After that would you be optimistic that bass traps or a reasonable sort (say 4” OC) could make a difference there? I'm probably not ready to jump into MiniDSP right now, but I do know this is something else to consider.