I get the the soft shut down ,as i have many ups for my servers and many computers in my business . but the computer is set up buy design for that situation and the computer does its thing before power hits total loss from batery
How does a pre amp or a ups give a soft shut down once the power is gone as it will soon get low or be gone from a ups
I can see the difference from plugging into the wall vs soemthing like a mr 4300 but the battery back up thing on a pree amp , im at a loss
I also called marantz and they recomended a ups but could not tell me why, deer in head lights !, and emotiva said to plug the amps into wall as it can cause power loss and ups and surge proctors are the majority of troubble shotting calls .
Is it a spike issue , a time thing or memory issue as its programed ?
my garage operner would not close the last 1/2 inch last week due to lost memory after power outage had to reprogram it
You do not need to run your power amps from the UPS. Power amps are generally tough enough to withstand surges. If not they are usually repairable. They other gear generally needs a one way trip to the recycling center after these events.
Equipment with microprocessors, and these days, that is most of your front end devices, receivers or pre pro, and your TV need vigorous protection from the power disturbances you describe, both over and under voltage.
The UPS will protect from over and under voltage, and shut your equipment down safely before the battery runs out.
If you use a pre/pro then the current draw of everything other than the power amps connected does not take a huge power draw and the batteries will likely last at least 20 min if your UPS is properly sized.
All I can tell you that what I have done here has been an outstanding success for 11 years. Is it bullet proof no. But without engineering this properly and robustly, I'm sure I would have lost a lot of valuable equipment on multiple occasions at this location. Everything except my power amps are powered from three UPS units. Downstairs there is one small UPS to power everything except the two power amps.