Is their any way to keep voltage steady?

Monster Cable makes a voltage regulator that retails for $1500. I'm not sure, but I think the PS Powerplant, which is considered the finest sounding device, also keeps voltage at one of several preset levels.

I am currently having my own dedicated lines put in. Following the lead of abstract7 in a previous thread, I (actually the electrician) will bring a 220 line from the box to a stepdown toroidal transformer which will the put out 110 Volt of what will hopefully be good power. I believe if 220 doesn't actually come from the box then 110 won't leave the transformer. Still it does seem like it should have a better chance at goodpower.
Any opinions?
By the way, I thought we use 110 volt or is it 120?

Most power companies are running anywhere from appr 115 to 123 volts with the median figure being between 117 - 120 volts from what i can figure. To me, that is a good thing. Slight sags are not as noticeable that way and most all equipment is designed to handle those voltages. Sean
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What about phase shifts, Sean?

One possibility would be to purchase a high-capacity line voltage regulator from a surplus store. These aren't too hard to find and are usually cheap (~100 bux). They will give you excellent voltage regulation, just be sure they have the capacity to power your amp. You may then need to add power conditioning because the old VR, while it will hold the voltage rock steady, won't necessarily clean up the junk on the power line.