Noisy speakers

Is it always on certain disc every time you play it? It could be electrical is it isnt always there. Furnace, dryer, flouresent lights and other items can cause strange noise when on.

I had a tweeter that had air escaping from behind that made buzzing sound once. Had to make a shim to stop it.

I had a recent experience with my Spica TC60's. The noise I experienced was a buzzing or raspy sound and the vocals were sort of nasal sounding. It was actually the banana plugs on the speaker post. I removed them and put bare wire in the post and all the noise was gone. Spades are better as well as bare wire compared to a banana plug that is not snug. They will vibrate and make a noises that will make you think your speakers have a problem. I'd start there.

Then check the tubes for microphonics. If it is a tube preamp or power amp turn the volume down and tap each tube with a pencil eraser lightly. If it comes through your speakers you have a microphonic tube. If no tubes check all your connections. If it is the speaker,.... it could be the internal wires resting on the cone of the driver internally and vibrating. Not likely but possible if you have been in it recently.

Agree with Ponnie that you should check your connectors. A bad connection can
even make a tweeter sound defective, according to UHF Magazine.

I did have a fussy sound on my VMPS center channel and it turned out the wood plug came unglued from center and was vibrating, I only found out when I went to pull driver to order a new one.