They make battery systems for this purpose. The can be plugged into the wall and charged and last several hours. I saw one once at my local hi fi dealer but I have no idea who made it
Has anyone used a full-system battery power supply?
It seems to me that the biggest problem in most high quality hi-fi systems is dirty power. My AC power in Vermont is weak and dirty. Has anyone ever heard of a massive battery power supply that could provide power to a whole system? Rowland uses them, and there are some newer phono preamps that use them. I am not very technical, so I don't even know if this is technicially possible. I have owned a PS Audio P300, and I didn't feel that it gave me $1200 of improvement. I also owned a Custom Power Cord Co. power conditioner and heard no real improvement--just minor differences. I owned a battery powered Camelot phono stage which was great until it crapped out in two weeks and I had to return it. Any thoughts on this mega-battery power supply?