My setup: Arc, 2 subs, 2 ERA 300s as surrounds. One of my ERAs is making a buzzing vibration-like noise when there is a lot of bass. Lorde’s “Royals” is case in point. The ERAs are on stands but they are tight and that doesn’t seem to be causing the issue. Have had this setup since the 300s were released and never had this type of issue. I also don’t stress the system so it shouldn’t be related to a blown speaker, etc. Just thought I’d try here before looking at warranty service. Thx.
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