well, for what it's worth, i live in boston as well and have experienced similar differences with my systems that i attribute to the power.
oddly, the evenings in boston seem to be the worst times for power. often things sound pretty good to me in the morning and early afternoon, but get noticeably worse in the evenings -- until 1am or so.
and it does seem that some days are worse/better than others.
oh well. i just deal with it by listening to better-recorded material or by just watching tv. flight of the conchords sounds funny with bad power or good...
oddly, the evenings in boston seem to be the worst times for power. often things sound pretty good to me in the morning and early afternoon, but get noticeably worse in the evenings -- until 1am or so.
and it does seem that some days are worse/better than others.
oh well. i just deal with it by listening to better-recorded material or by just watching tv. flight of the conchords sounds funny with bad power or good...