Again the topic of weight of amps

Why how about The Devialet Mono Pro? Light, beautiful, sounds amazing

My new PS Audio M700 Monoblocks weigh 13 Lbs. each..
They sound better than the Class A 70 Lbs. monsters Monoblocks they replaced..

Interesting...care to share the monsters' names?
I suppose there are good and bad heavy amps.
both my Classe CA-2300 and my PSAudio BHK-250 are 
amazing.  I don't lift them much, and I don't need mono blocks with either amps.  My speakers are Revel Studio II's and B&W 802N.
thanks again,  Ken

Class D - just like most Class A & AB tube amps are really dependent upon good circuit design, quality parts and implementation. There are some that sound very ordinary and others that sound fantastic. Never rely on the words of paid reviewers to determine which are which. Audition is the only way to tell for yourself... and feedback from trusted users here in this forum can be an invaluable tool as well. But the truth is some designers just get it and their products are better than others. Seek out the products from designers who have proven track records of accomplishment in the Audio field. 
I have been listening to a Class D amp for 5 years now and have been extremely satisfied. But mine amp is also the product of a designer who has decades of experience and is himself a true music lover with an ear for real sound. 

Point being - don’t discount a properly designed Class D option. 

I built my amplifier system with a separate power supply and separate monoblock final stages with big radio station transmitting tubes and a separate SET with its own separate power supply and, of course a separate preamplifier. If I had built it into one cabinet I could never manage the weight of it all even with my years of amateur bodybuilding. In addition, if something needs to be repaired or I figure out an improvement in the design, it is much easier to take out one chassis and fix it.