The areas where DC power gives you the best return is where the signals being amplified are tiny such as in a phono preamp or turntable. I have an turntable that is battery operated and a Nagra phono preamp that runs off a 9 volt battery. Unlike others, I cannot say there is a big difference sonically in the phono pre with the battery Vs the wall wart, but with the turntable where I am using a low output moving coil the noise floor and degree of hum are much improved.
I would not bother going to the expense of using a battery/inverter with the downstream electronics contrary to what others have said. If you think you are dealing with dirty or fluxuating AC try a good power conditioner first.
The other part of this equation is how sensitive your speakers are. If you have 100 db efficient speakers (as I do), getting as much hum out of the system as possible by isolating and grounding your speaker and interconnect cables will give you a bigger return than going off grid (IMHO). Good Luck!
I would not bother going to the expense of using a battery/inverter with the downstream electronics contrary to what others have said. If you think you are dealing with dirty or fluxuating AC try a good power conditioner first.
The other part of this equation is how sensitive your speakers are. If you have 100 db efficient speakers (as I do), getting as much hum out of the system as possible by isolating and grounding your speaker and interconnect cables will give you a bigger return than going off grid (IMHO). Good Luck!