I am just using a UPS (Uninterruptible Power System) for my desktop pc, but some pc salesmen says that for added protection I have to also use an Automatic Voltage Regulator (AVR) before connecting it to the tower casing power connections. Maybe, they’re just doing some sales talk to have more sales of their products. But at the back of my mind, maybe they’re right. As I already know that the main functions of AVR is to maintain exact amount of power that goes out while UPS main role was just for back-up power when there’s power failure so as not to interrupt the power supply of the pc. Two is better than one… possibly. But I would like to ask you people what are you using?
I agree with beetlejuice and Ronjor - any truly good UPS is going to include voltage control. I have a Back-UPS XS1000 from APC, and not only does it include voltage control, but the voltage control sensitivity is controllable through the included software (APC PowerChute Personal Edition). See: http://www.apc.com/products/family/index.cfm?id=22 or http://www.apc.com/products/family/index.cfm?id=23 Pete
APC all the way, three of them in fact including 2 Smart UPS 1000s, also all my household electronics are hooked to APC surge protectors.
APCC Back_UP 650. Excellent service from that Company, especially when updating the equipment after say three years.
Nothing but APC for me, and nothing but APC for my clients. They've proven themselves over the long haul many times. In addition...you'll notice that when you begin building computers/networks with everything plugged into various APC battery units..you don't see the rate of failures in stuff like power supplies, or burnt out routers, etc. The APC units pay for themselves in that alone. Quality conditioned power goes a long way in reliability and life expectancy for your equipment. Plus APC is a great local company (45 minutes from my house)..in good old New England USA.