I have a Wharfedale NE-571 USB micro system. If it's been off for a period of 1/2 days, when it's turned on the voume is so low that it has to be turned upto nearly maxium and even then it is barely audible. Turning the unit on and off cures the problem, but of course, all memory settings, clock etc. are lost and have to re-programmed in. II've lost count of the number of times I have re-set the clock and radio station pre-sets. Anybody got any ideas? Thanks