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I wonder if a battery-inverter setup would give cleaner power for less money? For less than $40K you can buy a couple powerwalls along with a top-rate inverter/
by Johnny555 8y ago
I wonder if a battery-inverter setup would give cleaner power for less money? For less than $40K you can buy a couple powerwalls along with a top-rate inverter/charger.
- LeoPanthera 8y agoOr, with less insanity, DC powered equipment running from batteries. Which is still pretty insane. A good quality PSU should be able to tolerate quite a lot of noise. And power conditioners are already a thing.
- analog31 8y agoIndeed, and if you think about it, an amplifier is a power conditioner.
- codewritinfool 8y agoExplain to me how an amplifier is a power conditioner, please.
- analog31 8y agoAn amplifier conditions the line power in a couple of ways. First, it converts line power to stable DC voltages while filtering out spurious signals that could affect the audio output. Second, the power amplifier circuit is designed so that the output voltage is proportional to the audio input voltage, even in the face of power supply variations. A well designed amplifier tolerates a fair amount of noise and amplitude variation on the input power line. The end goal is for any residual variation to have a minimal audible effect. For this reason, additional power conditioning is rarely if ever needed. My source of this information comes from the musical instrument and live-sound side of audio, rather than the hi-fi side. But most mainstream designers do not recommend additional power conditioning. Of course nothing prevents people from buying additional gear if it makes them happy. And in the audiophile world, there is some interest in exploring the behavior of historical or minimalist designs that might not have a very high level of power conditioning. I'm only thinking about "mainstream" gear.
- marcosdumay 8y agoA thousand times this. Any cheap op-amp you get on the market has 60dB (seems to be a standard) of noise rejection from the power lines. Add a filter you'll have to put anyway at the internal PSU and an amplifier should be able to deal with about any kind of noise.
- Bud 8y agoYeah, this is what I was thinking. Why not just install a solar roof and a Tesla Powerwall? Way-ass cheaper and a lot more benefit.
- myrandomcomment 8y agoI had the Tesla guys out the day after xmas doing the survey for the roof! Looking forward to power off the grid (PGE has 15 outages this year). For my audio equipment I did the sane thing an used a good PDU. 40K for a power pole is silly money for no really use. I have a reasonably priced tube amp, speakers and record player. There is some point where I just cannot hear the difference. This is stuff is here is just freaking stupid level of money.
- trashcan 8y agoAre you going to get a powerwall? If not be aware that in some (all?) states if you don't have your own battery source, your power will be designed so it is interrupted during an outage.
- CaliforniaKarl 8y agoThat’s a double-conversion UPS: AC to DC, a small siphon for batteries and control hardware, and then DC to AC out. I imagine an audiophile would say that the sine wave generated by such a setup wouldn’t be smooth enough. They’d want something like a double-rotary converter, so that a spinning generator is making the final sine wave.
- kazinator 8y agoI think pros in the music and sound reinforcement industry tend to be satisfied with rack-mounted power conditioners.
- ianhowson 8y agoBut the amp converts that AC back to a flat DC anyway! In any case, PSRR (https://en.wikipedia.org/wiki/Power_supply_rejection_ratio https://en.wikipedia.org/wiki/Power_supply_rejection_ratio) is a real, measurable thing.
- sjwright 8y agoSuch audiophiles don't believe in real, measurable things. And they certainly don't understand how power supplies really work.