UPS vs LPS

What about noise from transformers at the pole? I would imagine that a UPS would calm that noise down, perhaps replace it with its own, and then the filtering of decent power supply in the sources.

That's like cherries vs oranges.  Give me a break.

I understand UPS for backup power only, per above AC>DC>AC=inverter issues= sq issues. True battery power, AC>DC off battery supply specifically designed for that particular piece of equipment. I had NEW (Nirvana Electronic Works) DCA 66 class A SS amp back in 1990's, ran directly off four 12v lead acid batteries, another example is my Merlin VSM-MM BAM which runs off four 9v batteries. AC in these cases purely to charge internal batteries. Gets one off the grid without the added inverter.

Thank you.  It seems my investment on the UPS is wasted due to my ignorance.

I mentioned this in other posts. I run some equipment off lithium ion power supply, the inverter is indeed noise and affects sq. The LPS can be run off the UPS, which I do, the sound quality still impacted by inverter.

I assume audiophile UPS may be on way, someone will attend to inverter quality.

UPS only runs on the inverted AC during the power loss condition.  Otherwise, it runs on the normal AC power.  I will not continue with playing once the power is interrupted by storm.  It just provides a window of time to turn the system off.  I guess my question (sorry I may not make myself clear) is that, with AVR and noise filtering, could UPS provide clean enough power to the audio system?  Does the low-ripple voltage (thru AVR) not yield low-ripple current and cleaner power?  

Very different animals. A linear power supply usually converts AC to a specific DC voltage for a device. It provides clean, ripple free power. An uninterruptible power supply uses an inverter to generate AC power from a battery in case of an outage. This is usually a noisy switching power supply and is likely a big step down in quality. Not recommended. There may be higher quality UPS out there, but I’ve never heard of one. Same issue can be had running solar or other off grid power solutions that use an inverter.