@deep_333 --
Interesting topic. Never heard a well set-up multi channel system to convince me of its sonic/musical merits (which is also saying, implicitly, that I’ve heard a range of bland ones), not to say there aren’t good ones out there.
As it is though to me the quality of reproduction doesn’t fall back on an added number of channels to aid the immersive experience (which can indeed sound distracting to my ears with music), but rather the core nature and quality of the two main channels + subs. Not because I’m an analogue "purist" - I use a digital source only in addition to a DSP-based fully active setup - but simply because the sound coming from 2 channels, and what has been invested into and "perfected" around them, is the more natural and "right" sounding to me.
A typical scenario implies that I would listen to a multi-channel system quite different from my own with regard to the specific components used (not least the speakers), with the more interesting and relevant experiment being the one that was made around a component-similar expansion of my existing setup and seeing how that would turn out. With a given budget though I’d still max out the potential of what I have (or would upgrade to) from a 2-channel approach rather throwing the same coins at a channel expansion, not to mention if it involves reshuffling the cards entirely with the choice of main speakers and subs into a more size friendly package (it’s a slippery slope, mon frère).
I have experimented with a stash of crossover components from GR research. 400 to 600 dollars at most (or say under a 1000 dollars) in crossover component upgrades gets the fidelity close to max (ime) and diminishing returns hit like a wall thereafter, as you go up in price. But, a crappy driver from a manufacturer is a crappy driver and there’s no fixing that...
Manufacturers have cheaped out on crossover components so badly that the illusion of crossover component quality being the main culprit exists.
Agreed on the importance of the quality of the drivers, keeping in mind first and foremost their proper design implementation and what this means in singling out a range of fitting items that aren’t necessarily the more expensive or "exotic" ones.
Coming down to it though you only get so far with the quality of the drivers and crossover parts when the latter is placed between the amp and drivers. Even the best passive crossover components can’t escape the fact that they’re impeding with the amp to driver interface, potentially much more so the more complex they are, and it also means only taking partial advantage of your amp’s performance envelope instead of having it looking into a purer load actively.
What some may feel is gained from a "purist," analogue approach with quality component passive crossovers to others is missing the bigger picture in not taking into account its negative effect with regard to amp to driver interfacing. The quality of a DSP acting as a digital crossover actively is not irrelevant, but from my chair its overall sonic impact is of a significantly more "benign" nature as a line level, prior-to-amplification measure compared to a passive configuration on the output side of the amp, which affects both amp and driver performance more severely.