High Fidelity Cables MC-0.5 Effect

I bought a MC-.05 to try.
Put it in outlet that supplies my amplifier power.
Burning in for 2 days now.
Did notice a *little* more upper midrange clarity,
But depending on music/recording, the bass is a little more boomy.
Is this normal for 'break-in period'?
Looking forward to more burn in..

@nonoise and @lowrider57  - Thanks guys. A little afternoon listening today and I would say:
1. Initial upper midrange prominence (more thrust forward than overdone) has retreated back to similar/proper stage with the other frequencies - although the snap of a snare drum several feet forward was pretty cool
2. The bass that was a little boomy has now firmed up some, and I think I'm getting another few cycles than without the MC
3. The upper treble is still nicely detailed, but is missing that absolute last bit of extension on cymbals and triangles. (May be hot afternoon power flow to my house vs. late[r] night)
One thing I think that may be effecting my overall sound as well - the unit is on the same outlet as my amp and I have a subwoofer powercord on the splitter with the MC-.5.  Maybe that's contributing to the sense of extra bass from the sub; I many ultimately need to dial the sub gain back a few ticks.  

@lowrider57 Power to sources are unfiltered, direct from the wall. I do use DIY powercords using cryo’ed Acrolink 7N 4030II cables and Oyaide P-004 terminations for both transport and dac.  MIT interconnects and speaker cables.

Thanks lowrider. Considering getting a second unit after a little more break-in.
B-stock pricing is pretty sweet :D

Quick update - everything sounding VERY nice.  Little instrumental clues are much more clear, soundstage well delineated. Seems to enhance the space, sweetness, and silence between notes and instruments that I appreciated first with my MIT cables. Bass firmed up from initial installation, and still nice and deep.  Overall a definite winner.  I did not move the unit to the 'source' side/outlet, but will likely add another MC unit within the next couple of weeks. (Original unit is between 200 and 400 hours so far). Thumbs up !!

Put my money where my mouth is and purchased second unit today.. Will put this one on the 'digital' outlet.