Easy test without buying anything would be download and run a 1khz and/or 10khz test signal through one channel at a time and use a SPL meter on your phone. Make sure you don’t change the volume when switching. The right channel is the one you suspect so I would test the left first get up to 85db with your phone 1 meter from the center axis of the tweeter and mid. Then try the right channel 1 meter from center axis and see what db you get. It’s not a perfect test but it should show if there is a big variation. Should be able to hear if there is a big variation.
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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@ghdprentice thanks; actually that is my daughter peeking out! She tends to do that and I don’t even notice... At least component-wise, it has to be either my amp or the DAC module in my amp. Can't see how a USB streamer would cause an imbalance of frequencies between channels! I have a hunch it's more likely to be the amp, not sure why, but I could see it being the DAC possibly. I am going to dig up my CD player and input it into my amp, to rule out or pinpoint the problem to the DAC module. Also, I have an old Arcam A85 integrated amp tucked away that I haven't used in years, that I could compare with, but if I recall I think it only accepts banana terminations. |
Thanks @djones51 , I will try that. I'm not sure if the variation is "big" or not. I am very sensitive to tonal imbalances, so it could in fact be very small. Although my wife can immediately hear it as well. Also, while it is blatantly noticeable on many tracks/artists/recordings, especially if there is not a lot of reverb in the recording, mostly being apparent in upper ranges of vocals (singers sound "fleshed out" in the upper ranges on the left but not the right), on many tracks the effect is very, very subtle. @djones51 I will try your suggested "imperfect" test. But I'm curious, what would the perfect test be? |
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