Power help

I think those PC backup power supply units sound pretty bad. Why not try it with and without the UPS?

The APC UPS puts out terrible, square wave power that’s full of noise that even the best linear power supply can’t clean up. The APC also doesn’t cutover cleanly from utility power to battery power.  You could go with an on-line pure sine wave output UPS like the Eaton 9130. The only downside of the Eaton 9130 and other high quality output UPSs is they have noisy cooling fans, so they need to be located outside of the listening room. 

@kosst_amojan your message is contradictory. Re-engineering a power supply will be nearly impossible for most people who don’t have the knowledge or means. Even for people who have the knowhow, the cost of upgrading power supply upgrade parts and real estate limits inside the components is another limiting factor. It is infinitely better to solve the problem at the source by adding a good UPS or at least a good power conditioner.