Again the topic of weight of amps

@noble100
I find this review of the Kalugas by Audiodrom to be interesting in that they seem to hear some of the same stuff that I heard from the Atsahs but they have different take-always than in the Mono & Stereo review and believe the Kalugas to be reference caliber.
http://www.audiodrom.net/en/power-amplifiers/detail/33-power-amplifiers/556-mola-mola-kaluga
A couple of quotes from the review,

Spatial presentation of the Kaluga monos is enhanced by excellent separation and focus, and brought down a little by slightly subdued ambience – it is as if some part of the spatiality was encoded in the harmonics that are suppressed by NuCore architecture. I could hear the soft ambient echoes of a cello playing in a church, for example, but the trailing off was unnecessarily fast to my ears. However, the width and depth of the macroimage was excellent and images were locked with surgical precision and authority.

The subdued ambience thing is my main downside to NC1200, even more so than the bass, which I could live with by using subs for the lower frequencies.  Below is an interesting observation they make about the bass, 

The dark side of the Mola Mola Kaluga’s bass? Due to no overhang and smear it sounds different from what we are used to. Thus it actually may sound ‘less developed’ to some ears. The audiophile desire to hear the things ‘as they are recorded’ conflicts with the audiophile desire to hear the things ‘as I like them to hear’. Sorry guys, the Mola Mola Kaluga is the former case.

Tim, I said the RM-200 is "really nothing special"? Au contraire! There is much more to the amp than what I wrote above, as a reading of the review by Fremer and Atkinson in Stereophile will illuminate. The "sales pitch" crack was made in reference to past comments by someone (I don't hold grudges, he's entitled to his opinion) about my too often mentioning of the amp. I like to bring to peoples attention over-looked products, like the Eminent Technology LFT-8b loudspeaker, another tremendous bargain.

@fleschler I weigh 182lbs, lol, and my wooden floor, with substantial joists, supports me. My upright piano weighs 500lbs, and there is no problem with it either.

I don’t think stereo components weighing a few hundred pounds are a problem for most structures.

mitch2,

     Thank you very much for your interesting and informative responses.  Your, and some reviewers, mentioning the whole issue of truncated bass notes on some class D amps was new to me. After rethinking my experiences with multiple class D amps in my system, however, I completely understand this perception and believe the exceptionally high damping factors of class D amps may be the culprit.  In retrospect, I certainly never heard my Magnepan 2.7QR produce the type of bass that they did when powered solely by my very high powered class D mono-blocks with damping factors >1,000.  I remember enjoying the tight bass but have to now agree it sounded a bit tauter than natural bass heard live.
     Good luck with your new amp rebuilds.

Thanks,
  Tim

@larrykell  I said that I couldn't physically handle a 185 lb. amp.  My current listening room floor can handle a 7.5+ earthquake let alone a few hundred pounds of equipment.

My 1993 constructed prior home had a similar custom 6" slab with 2' exterior footings, 1' interior footings, 8" plate with 6" staggered studs every 8"- no damage from the 1994 6.9 Northridge earthquake.