Your points on elements within a system that work strongly to achieve life like dynamics really isn’t particularly on point nor reflective of perhaps more typical experience.
- Extreme forms of vibration mgmt.- (these can help in some applications in terms of dynamics in my experience but vibration management doesn’t always buy dynamics... more so under power supplies but under other components resolution can more often be the primary gain)
- Extreme forms of electrical mgmt. (some ‘extreme’ forms of power management actually do quite the opposite if they are worked too heavily into noise suppression and can often then bury dynamics... Shunyata is an example of one power conditioning and cable system that clearly does work towards exploiting dynamics)
- Speaker placement (full-range) (speaker placement contributing to dynamics... once again not really the principle outcome from dialling speakers in which is more often about coherence, soundstage and balance.
- Unamplified gain stage i.e. a passive pre. (Wow, passive line stages are often incredibly poor in this area... often dynamics can be their archilles heel and most people comment rather that it is resolution and low noise that makes them go for a passive and instead having active pre stages has a lot to do with gain structure and dynamics IME)
- Robust amplification. (Too broad a definition I’d suggest... a poorly designed amp no matter how robust could just as easily be flat, compressed and unlistenable as it could be dynamic.
- Dedicated lines for high-current-drawing amps already flirting with a circuit’s amperage limitation. (This is actually often helpful in terms of realising dynamics)
- Listening volume levels that approach live performance volume levels. (This is such a misdirect... I agree with Brad, if your system has to be thrashed to sound interesting and just isn’t performing satisfyingly at lower volume levels there are probably system issues that could clearly relate to it missing out on dynamics)
You are correct. My list is not reflective of the more typical experience and most likely far from it. Hence, I would think one might be a bit more circumspect when critiquing it since they should be less familiar with it. But I'll address your points individually. And for sake of argument let's assume that the dynamics as well as a tremendous amount of music info is embedded in a given recording.
Extreme forms of vibration mgmt.
You comment as though you ignored the Extreme attribute giving indication you don't comprehend what I'm speaking of. But it's a form of vibration mgmt that literally will triple or even quadruple a component's level of musicality. For example. In June of 2017, I reinstalled 3 little passive line into my rack using even a far more extreme method than the previous extreme method. Though it took quite a long time, the end result was more than triple (I'm guessing) the line conditioners' original sonic benefits. This extreme vibration mgmt method does likewise with components. There's also the speaker cables (SC's).
Extreme forms of electrical mgmt.
This encompasses a number of things including and especially superior line conditioners that actually work. IOW, they actually cleanse, purify, filter, and/or condition the noisy AC coming in from the street. I can't speak for the line conditioners you're familiar with but the Foundation Research and Jena Labs line conditioners I've used since 2001 always improve performance including dynamics. Then there's the line conditioners' installation method I mentioned in the vib mgmt section. There's audio-grade fuses, AC plugs and outlets and IEC connectors and inlets and even the Romex. There's cryo-treating via the superior full-immersion method of all those electrical items mentioned above including IC's and SC's and PC's. BTW, exploiting is not the word I would choose.
Speaker Placement
There is no substitution for dialing in the speakers into a given room. I'm pretty confident that for every full-range speaker / room combination there is either THE optimal or at least several optimal locations that when achieved can generate the most well-defined, deeper, tighter and more musical bass. For you to comment as you did, leads me to believe you've yet to encounter it. In 2 previous rooms / homes, I did encounter it and like I said, there is no substitution for it and is a phenomenal contributor to dynamics. In my current room I have located a more optimal location but not THE optimal location. And it ain't easy. One room took me over 9 months to locate. My current speakers are 240 lbs. each so maybe one day....
Unamplified gain stage (passive pre)
You are correct here and though it seems like a step backwards, it's very much a requirement for realistic dynamics not in your face or 5 ft in front of you but up on the soundstage with the rest of the music. A passive pre makes this happen. Moreover, a superior passive pre will present a cleaner signal since the signal is no longer being amplified here.
Robust amplification
I understand what you're saying and I agree. That's why I tried to stay very generic with this term lest anybody try to take me down their amplifier rabbit hole. But the flip side to the unamplified gain stage above is a high-powered amp on this end. This is what provides the dynamics way behind the speakers and up on the soundstage (where they belong) that otherwise are missing when going the passive pre route. In my case, my current amps are rated more than 3 x's the WPC of my previous 180wpc BMC C2 amp. Most of us have either tried a passive pre or know those that have and the lack of dynamics but cleaner sound presentation seems to always be the take away. I've tried it twice before years ago and swore I'd never go passive pre. This time I tried it again but with more than 3 x's the wpc and it made all the difference in the world with a good reasonable distance between my ears firmly planted in the audience and ALL the music including dynamics at a distance upon the soundstage. Now that's realistic.
Dedicated lines for high-current drawing amps flirting with the circuit's amp limitation
Yes, you are correct. In my own experience, years ago I had a 300wpc@8ohm 20amp amplifier on it's own circuit/line but was shared with a pre-amp that consumed 23 watts and about 2 amps. Once I installed the pre-amp on its own circuit/line instantly the dynamics came alive for every music piece I played. That pre-amp apparently was drawing just enough juice to restrict current to the amplifier for perhaps every dynamic/complex passage.
Listening volume levels
You and Brad are welcome to think what you want. But I pursue realism and there's nothing realistic about listening volumes much lower than live performance levels while striving to achieve the benefits of the live performance. I could turn the volume down your guys' levels but then I'd be, well, like you guys. Driving that Top Fuel Dragster down the quarter-mile at half-throttle but expecting full-throttle elapsed times and speeds. That just seems silly to me. About 9 years ago, I had a reviewer visit who listens to everything at about 61 db and it took everything in me not to throw him out into the street. What a quack.
FWIW, I never listen to music passively while reading my favorite novel or just to pass time even though many do. Everything I do in this hobby is related to performance and I think that is best reflected by the roughly 65% of my entire playback system's retail costs being dedicated entirely to my playback system's foundation i.e. the extreme forms of electrical and mechanical energy mgmt sectors. I consider these 2 sectors the foundation of every last playback system is built on whether they realize it or not and whether it be a rock or quicksand. And IME, a superior foundation makes all the difference in the world. Every time I sit in my listening chair it's more of an evaluation period but I like to think with great enjoyment too.