I am using a Cyberpower pfc 1500va ups for a few months now. I am searching for information on which electronics benefit from a stable voltage, or in other words which ones perform better when using constant voltage regulation. I haven't found much, in some article i read that some printers when printing high detail paintings or something, even the voltage variations would affect the detailts of the print. Also i read about music output from hifi systems that perhaps completely stable voltage has a better sound result or something like that. A Cyberpower employee i was discussing with through email was telling me that it does not make a difference for hifi, except in "BAT mode" which i have still not researched what it is exactly. Any info on the kind of electronics that require constant stable voltage to get the best performance possible?
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Which electronics require or benefit from a stable voltage?
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larrymoencurly
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Almost all modern devices contain voltage regulators where needed, so they don't benefit from highly stable AC voltage. OTOH very old CRT TVs and monitors, probably built in the early 1970s or earlier, don't have voltage regulators, or at least not very good ones, so even slight differences in line voltage can make their pictures change noticeably in size and brightness.
that last part is not true whatsoever. regulators dont fix the output voltage at an absoloute set level, regardless of the input. depending on the quality of the regulator, varying the input voltage will change the output voltage by some amount (in higher quality regulators, the amount is smaller). also the capacitors in your expensive power supply, and on your expensive video card, and on your expensive motherboard are there to smooth out the power fluctuations caused by varying line voltage. the more work they have to do, the shorter their lifespan in general.
it depends a lot on what your goals are, and if you actually need a highly stable voltage input. but if you are overclocking and need an extremely rock solid vcore, or if you are in an area that is prone to brown/black outs, a voltage conditioner/UPS is highly beneficial to protect all that expensive equipment.
when you start getting into audiophile-class audio equipment, the difference between the power that comes into your house, and the power that comes out of a good line conditioner, are night and day. the OPs point about hi quality printing makes sense in theory, but ive never read about that before.
larrymoencurly
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larrymoencurly said:
I'm confused. Why don't voltage regulators, which have their own highly stable voltage references, not provide such good line regulation that for all practical purposes it's absolute for consumer electronic devices? Most PSUs will hardly budge from 100-130 VAC, except at high loads.
So why didn't this highly credible guy think that everything in his audio amplifiers needed to be fed from regulated power supplies? The output sections were just fed directly from capacitors connected to rectifier diodes. The same goes for the Leach power amplifiers.
That's not to say I don't believe in using line filters to prevent noise from getting into the devices.