i've not used the car for 2 months so it needed a jump start on Saturday to get it cleaned up and everything
then another one on Sunday morning, but then it was fine when we stopped in the services
but then it needed another one at the end of the day when it wouldn't fire up but driving it home i sort of turned the music off when i got onto the m25 and yesterday morning it fired up first thing, but then was flat again this morning

but when it's flat, the stereo fails to work at all, it won't even turn on, which leads me to think that's the culprit, unless i've missed an obvious thing when i wired up the amp feed from the battery?