Last night I'm fiddling around with my first "mix" in what feels like 2 years. Little ways in and I notice my right studio monitor seems noticeably quiet compared to the left. Check connections and settings on rear of speaker as well as DAW and my Profire's onboard mixer. Everything checks out fine. Then I think it's just my ears screwing with me, and quite possibly my 99% untreated room. But I've pulled up many songs and mixes in this same room before and everything seemed fine. Now, if I pan my Master 50% over to the right, things start to sound even. This just seems insane to me. I also noticed the said quiet speaker would randomly make some sort of noise....almost like ground noise but not quite. Hard to describe and fairly soft. I was going insane trying to figure this out. Monitors are Equator D5's and I'm sure my warranty is up now that it's been almost 2 years. The one thing that I can think of is that the speaker that is seeming quieter has an XLR extension hooked up to it, as the cables that came with the monitors were only maybe 4 ft, I had to compensate to reach the rack where my interface lives. Maybe I should troubleshoot that today. Could my right ear just be THAT much worse than my left? Could something as simple as a stack of combo amps/speaker cabs about 3 ft away from the right monitor deaden the sound from that side more than the opposite side, which is only a rack?