As a computer/network person myself, I have UPS's on all of my customers' servers. I have the APC Smart-1400 UPS which outputs a true sine-wave. I have had this on my audio gear for 1.5 years and thought my power "needs" had been met. Then I auditioned a Blue Circle PLC at home and it dramatically improved the sound - I was very surprised. I believe that under normal use, the APC "Smart" lineup is basically a power bar with surge protection, until the power is cut. Then it switches to battery power. It is not a full time power generator like the PS Audio. I may be wrong on this. So if you like a UPS to guard against power outages, be sure to clean them up with a decent PLC. I have a PS Audio P600 on order and it should be here in a week or so. - Andy
