auto power off

I’m having an issue with my Swissonic A305 monitors and could really use some help. I know that these monitors are wired with reversed polarity (180° phase shift), so I decided to swap the + and – connections internally on both the woofer and tweeter to correct the phase. After doing this, one...

Hi could be a silly question , but a friend of mine has borrowed a Marantz MODEL 40n ,beautiful amp (made with to much plastic) , it does sound very good for my ears well many marantz and not only ,they have an auto standby feature (they call Auto Power off), after 30 minutes ( i guess ) they...