So I noticed a little static sound coming from my cab while playing at hmm, low to moderate volume, I pulled the grill, and let a note ring out while I stuck my ear by each speaker, and I can definitely tell it's coming from the top section, bottom left speaker. If I touch said speaker while ringing out a note, static stops. Blown speaker? Even at high volumes its just a little static sounding, just one speaker. This is late 2000's Viet Nam cab.