4 string. I like playing open E but it sounds so much more trebly than all the others strings. It's annoying. I have taken to muting it with my left index finger near the nut when plucking it. E when fretted is fine. Strings are Ernie Ball 45-105 rounds. Should I consider foam near the bridge? I don't want to dampen the rest of the instrument just because of the one note.