This sounds like a potential resonance issue at the tweeter during certain frequencies and sound pressure levels. I would check all connections, from amps to speakers, from pre to amps and whatever else you have. Use a set of headphones to see if you can isolate the noise specifically
to the speakers or a source.
Check your source material, perhaps playing the same song on CD and LP or whatever to make a comparison to see if the source is the reason. I had a similar experience with a song from the Eagles, Peaceful Easy Feeling, when the guitar riff would kick in I heard a resonance in the tweeter, after isolating the sound, I played with VTA and azimuth some to minimize it and then played a CD, then it happened again. Listening to this part of a song on friends stereo, I realized that the song itself also has distortion,,hmm. Sometimes, it can be a royal pain to isolate these types of distortion. After I made the adjustments to my equipment, I realized that I became hyper sensitive to this issue and now I am always listening for this type of distortion to appear so that I can attack it. Ciao,
Audioquest4life
to the speakers or a source.
Check your source material, perhaps playing the same song on CD and LP or whatever to make a comparison to see if the source is the reason. I had a similar experience with a song from the Eagles, Peaceful Easy Feeling, when the guitar riff would kick in I heard a resonance in the tweeter, after isolating the sound, I played with VTA and azimuth some to minimize it and then played a CD, then it happened again. Listening to this part of a song on friends stereo, I realized that the song itself also has distortion,,hmm. Sometimes, it can be a royal pain to isolate these types of distortion. After I made the adjustments to my equipment, I realized that I became hyper sensitive to this issue and now I am always listening for this type of distortion to appear so that I can attack it. Ciao,
Audioquest4life