I use a Belkin Pure A/V Hybrid UPS 1500, it's a line conditioner and battery backup. I use it for my A/V gear and sources year round, on my on amp only in the summer when I frequently experience brownouts and occasional blackouts. As for killing dynamics, I haven't noticed a difference since my speakers are very efficient(95db) and my amp has plenty of reserve power(300wpc).
As for my other rig, I only listen late at night or early in the morning when power problems are usually not an issue since I'm using a 20wpc triode amp with 85db speakers.
As for my other rig, I only listen late at night or early in the morning when power problems are usually not an issue since I'm using a 20wpc triode amp with 85db speakers.