Marantz PM Ki Ruby vs Musical Fidelity M6si

@p3ga  guess what.. I got the Pm ki ruby. Arrived yesterday and I have spent a few hours with it.

initial impressions, nothing ( and I mean literally nothing) sounds harsh at even very high volumes. Treble is definitely rolled off but there’s still plenty of detail. Mid range and bass are excellent. Vocals are gorgeous and bass is tight and fast. With the musical fidelity 5si, often times I couldn’t go past a certain point with a lot of tracks before it got bright and fatiguing. Don’t take me wrong, MF is a fantastic amplifier, I was considering going for his bigger brother 6si. Very lively and energetic sound. Very musical too. Was a bit too revealing for my dalis esp when playing tracks with a wide dynamic range.

Anyway, the negative seems to be the flip side of the pro. Everything sounds a bit darker and sometimes unexciting.  It’s too early to come to any conclusion but these are just my initial impressions.  Does this make sense?

what changes do you think I should expect as it burns in?  
Thanks again for helping me pick this amazing and unfortunately, underrated amp. I’m elated even with the way it is right now.

I am done looking for perfect measurements and clinical sound. I just want engaging music and the PM ruby shines on that front. Great work by KI!

Well congratulations on the new addition to the family!

There was some break-in time, I recall more extension in bass & highs after a few weeks. 
In one of the posts above, nonoise mentions power conditioning: I can attest to the fact that the Marantz likes & appreciates clean power.The amp is revealing enough that you should be able to hear a difference in ac cables: A Pangea will make the amp sound dull and lifeless; the Amazon iron lung jellyfish  (<$20) really opened up my system:
https://www.amazon.com/CableWholesale-10W2-51506-Green-6-Feet-Hospital/dp/B0069FLXLU
There's hundreds of others, I stopped there as I'm satisfied. For now :)

FWIW, I am using the Canare 4s11 speaker wire & Audio Envy interconnects from the Ruby SACD. An Audioquest Powerquest 3 protects all from voltage irregularities. Happy camper here.

Hope you enjoy the amplfier as much as I have mine.

@p3ga funny coz I just ordered the canare 4311 after a lot of research, and turns out it’s your recommendation.

I’m absolutely loving the amplifier. It’s opening up nicely, I can already hear a great deal of difference. Highs and mids are opening up and bass is punchier too.

That $20 power cable really make such a big difference? It’s so cheap that I cannot not try.

different topic, do speakers on spikes sound better than those on rubber feet? I have my Dalis on herbie’s rubber feet coz I have wooden floor. I’m wondering if I should buy those spike feet if they’ll make them sound better. Any thoughts?

my Dali's (many pairs) have always sounded best on Mapleshade brass cones, but the included spikes sounded good too...some prefer no footers...

@jl35 thanks for your response. Any recommendation for feet under the Dali spikes? I don’t want to damage the floor but at the same time don’t want to compromise on sound quality either.  I was consider the herbie’s pucks but there are several options on amazon for a lot cheaper. Having a hard time making up my mind.