Does the UMC-1 have bass/treble settings? If so turn the bass up a notch or 2 to see if that helps with the lower volume play back. I like Audyssey just for this reason, it boosts the bass and treble for lower volume playback and it works very well.
Yes it does; it has an Equaliser AND separate, general Bass and Treble, but I didn't use them. I'll give it a try and report back; I tried to get the best possible sound without tone controls (although I don't think there is anything wrong with using it). But it sounds like a good, quick idea.
