Paul,
How big a unit would I need for Paramounts, forplay III, reduction, Rega rp6, and the 25 watt amps in the min/max 2.2?
First, let me be clear that I was talking about a certain type of UPS, the kind that is essentially using battery power all the time, regenerating the output AC form the battery while charging the battery from the AC input simultaneously. These are referred to as sine wave or pure sine wave types. It's conceptually similar to the PS Audio and some others: a sine wave generator in front of a power amp.
Other types, sometimes called line interactive, will do the job that most people are looking for, but they don't do the job that I'm looking for. Which is cleaner power for better sound.
Cyberpower makes both kinds. A 1KVA, 600 watt sine wave unit sells for about $140. A 1.5KVA, 900 watt sine wave unit is about $215. It looks like either one will handle your load with room to spare.
The Hitachi's that I used in the past were quite large and quite a bit more expensive. I can attest that they did clean up the sound of the system. Again, I haven't yet tried the Cyberpower units, so until I do I can't state any opinion on how they affect the sound.
Paul Stubblebine
Paul Stubblebine Mastering, San Francisco
The Tape Project, LLC
serious student of the audio arts