High Fidelity Cables MC-0.5 Effect

I bought a B Stock 0.5

Is playing now.
A nice start.
More detail is instant.

Have three Bybee iQSE.
One in my fusebox, one in amp, one in Dac.
Looking for one more, to go in my Dac power supply.

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..

I found the base to be more prominent but also, more detailed, lower, and tighter in presentation. I've been wearing out some Billie Eilish CDs lately (I find her fun and refreshing) and the synthetic base simply growls and excites my room in a way I've not experienced before.

I'd give it some more time before you reach a final conclusion.

All the best,
Nonoise

@keithtexas 
 There is a breakin period of up to 400 hours according to manufacturer, although I'd say it's about 200 hours. There should be a noticeable effect immediately and over time highs should become smoother and soundstage will open up in all directions.

According to Rick, if using one module in your system, it should be placed on the line feeding the sources. 

@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.