Probably. I had to run my old Altec Lansing speakers from the wall instead of the UPS because of that.also, from what i've read, an UPS causes a good amount of interference on powered studio monitors like the RP8s
And while you might have good power, I'd still be scared to death running any computer system without a UPS now. Not just because my power tends to droop a bit sometimes (and flickering, but you wouldn't have that issue with underground lines), I noticed a decent drop in my electric bill since I put my tower and two servers on UPS units. Not entirely sure why.