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If power supplies whould be well constructed electronics will work with real AC. Computer can do that and some audio gear (Linn, Jeff Rowland, Halcro etc.) are beyond a transformer and a cap.
Several companies are releasing new power-conditioner products these days, some with radically new technology. Are you using them?
No matter how good a power conditioner is the gear is only as good as the power supply. The funniest thing to me is $500 power cables. Heard of an on-line UPS? How much do you really think a cable can do? I keep power to $80,000 RF Amplifiers clean with a UPS, If i reccommended a cable I'd be laughed out of a job.
Currently, I used surge protectors, Adcom and TrippLite in series, for sensitive equipmenti.e., DACs, CD & DVD players, preamps, etc. For amps, only TrippLite surge protectors are employed. Planning to buy line conditioners (with regulators) to replace the Adcom unit, but will consider those designed for office computers first. Only if I can audition the audiophile grade at home and make a comparison will I sink a penny into acquiring them!
PS Audio PP300. I completely agree with Mr. Deutsch's review, but would like to add: the main power switch/IEC connection keeps falling out of the back and internal wires disconnecting. The transformers are the loudest things in the listening roomrivaling my refrigerator's compressor for annoyance. Way too loud for gear intended to "quiet background noise." I'd be willing to pay much much for for gear that makes no mechanical noise whatsoever. Doesn't anyone?
I will be purchasing a pair of Foundation Research LC1s (mentioned in the October 1999 issue in coverage of the Montreal show) in a few days. These conditioners really have to be heard to be believed! My Chang ISO6400, though, is the very least I could get by on.
Currently a Furman IT-1220 balance isolation transformer for everything in my system including amps. In the past I used a TrippLite Ultra for digital components and a Panamax 1000+ for everything else except amps. I wasn't aware of any AC problems before the IT-1220 but now the sound seems to be more detailed. Now that I'm use to hearing my system with the balanced power conditioner, I wonder if I'd miss it badly if I took it out of the system. I have not taken it out yet so I don't know.