Power is just one of many ways noise has of getting in there. A battery is one way of lowering noise. My motor was at one point upgraded with battery power. It does make a difference. Even with the battery though it still needs to be disconnected from power or noise still comes in. Even then the power supply is but one small part of many. Everything matters. Focus on the battery if you must, but you'll be way ahead of the game if you put a lot more focus on the sound that comes out than the parts along the way. Only once you select the best phono stage that way, then you can look at tweaking different aspects of it.
In other words buy the Project if you like it the way it is, but not because you think you're gonna make it so much better by replacing a wall wart with a battery. You will make it better all right. But not much. Not much at all.
In other words buy the Project if you like it the way it is, but not because you think you're gonna make it so much better by replacing a wall wart with a battery. You will make it better all right. But not much. Not much at all.