Power help

@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. 

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. 

A good UPS will cost somewhere in the neighbourhood of $1000 to $1500, depending on inverter output quality, battery capacity and inverter capacity. I was able to score a few surplus 1500VA Eaton 9130’s with one string of batteries (all you really need for hifi) for $250 each. It’s all time and place. The 9130 has 9-factor power quality correction (surges, brownouts, phase, blackout, transient noise and others), and produces the vitally important perfect sine wave output, free of harmonics. Just keep your ear to the ground on fleabay and Kijiji for similar deals.