How to Solve High-Frequency Suckout in Room?
After upgrading my system including speakers, I'm noticing with more upper frequency detail, that the right channel has some degree of missing high frequencies. I've confirmed it is my room by swapping speakers, swapping cables for left / right, and of course the cables are all in phase.
My room is quite large, open concept, but my system is to one side of the open area. Ceilings are vaulted and are 12ft at highest point. The speakers are not near any corners, due to a jut-out on the right side and the other end being completely open. However, there is a partial wall on my right side that has no treatment on it that extends up to 12ft, from the listening position. This wall starts 3.5 feet in front of the right speaker (about 1.5 Ft to the right of the right speaker) and continues to behind the listening position.
I've tried putting pillows against the right wall and thought it may have made the problem worse? There is no wall on the left side, it is completely open. Does this make sense that there is missing high frequency on the right side, where the wall is? And, is there anything I can do to fix this? I will attempt to draw the setup but I'm guessing the alignment will mess up when I post this!
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How much of a toe in towards your listening position? Where do the tweeter axis cross? Here’s what I’m thinking…it isn’t the wall on the right that’s an issue. It’s the absence of wall on the left that’s causing the highs frequencies to just get dumped into that open space. Have you stood in that opening on the left to see how it sounds vs your listening position just as far as the highs are concerned? I may be completely off track here though… |
Well @erik_squires posted while I was writing my response. Looks like @erik_squires is also thinking along the same lines. |
I think this might be happening because the first reflection point is close to the wall on the right side and the wall reflects the sound again to the front of the room rather than towards you. I had similar issue with the soffit running on the left side of my room. As soon as I identified that and put a panel there things improved pretty much and I got great stereo image. If you have got some tall cardboard boxes, try to line them as it extending the wall "towards" the speaker and see if that is what the issue is. If that is the case, then a GIK gobo might be your solution. |
@ghdprentice I will upload photos later this evening. Regarding placement and toe-in, I’ve tried many different positions and various toe in and the right side sounds soft in the high frequencies no matter what…. Its noticeably worse on some tracks, and with others barely noticeable. My wife can hear it as well (she thought it was off balance but it’s not actually). There is nothing on the left side so no ability to install dampening. I did try shifting the entire system to the left, moving the right speaker away from the right wall, and it seems to be the only thing so far that has helped. However it’s still noticeable. I’ve not measured it but it’s pretty obvious and only on there right side. Others can hear it too…. Will upload photos later tonight!
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