@bigddesig3 - I think you are pushing too hard on your sell. There’s many different opinions and actually many different configurations that would work great in different system synergies. There are elements of monoblock amplifiers that will be superior to stereo amplifiers (depending on size and design). One aspect is completely dedicated power supplies. Stereo amps will usually share a transformer and/or the actual power supply. The exceptions are stereo amplifiers that are built as "dual mono" amps (where each amp channel has a dedicated transformer and power supply).
Another aspect is size of power supply - which generally affects the ability to drive certain speakers. A larger power supply can give more muscle in the bass/midbass area. Granted, speakers with higher impedance (such as flat 8 ohms) or easy to drive speakers make it less critical for big power supply. But many woofers nowadays will actually drop down to 2-3 ohms at times. Some drivers are extremely hard to drive. Class A output can definitely smooth out an amp circuit that is usually bright/thin, but only a large power supply will give you that bass heft. I have compared multiple amps with different size power supplies.
Finally, monoblocks are usually a fully balanced differential design on the power output. I totally understand that there is much controversy in the industry as to whether or not balanced differential output is better than single ended, but I usually have found differential is better. There are some stereo amps that are fully differential (many Pass Labs stereo amps are balanced/differential output).
I’m not arguing against the idea that Krell Solo is a very good amp. We just need to keep an open mind and have a complete understanding on what to expect with each amp choice.
To this day.... a proper Class A design will be the best sound.
I actually disagree with this completely. Class A can be very good in some scenarios, but it will not provide the absolute best sound because of different system synergy and different personal tastes.
--More to come on this Class A thing - I’ve been listening to these Parasounds closely this weekend and I’ll write up more on this after I get a good listen to Bryston 7b3.