Speakers The single most critical component


I know we've been over this Q hundreds of X's over the past 20 years here on audion, You can find dozen of topics dealing with this Q <which is the ,,,,most important component...>>
well time for yet 1 more topic dealing with this,, perhaps unanswered, un-resolved issue.
I'm bringing up the old hachet due to my recent experience acutally hearinga FR in my system. 
Let me tell you, there is not even 1 traditional/conventioanl/xover design <The Boxed Type>> in the world that could convince me  , there is something that will beat out FR (caveat, FR requires  some sort of high sens =sensitivity, tweeter)  in  the Boxy world of speakers.
That is to say, FR + Compression Horn is the future of 21st Century high fidelity. 
One lab has already brought us these ~~~SHF~~~ aka SuperHighFidelity  single drivers. 
The code word here is ~~SHF~~~ which can not never be employed when describing xover/trad/conventioanl style  aka The Box designs. db level under 91 are _<<IN-EFFICIENT>> , = dysfunctional, out dated, old school , = Dinasaurs. 
For amps, I only consider tube amps (PP and SET) as ~~SHF~~~ I can not include ss amps in this topic. 
IMHO all well made tube amps sound very close,
 a  kt88 in brand X will sound  close to brand Y. 
So amplification takes a  distant 2nd place in critical component.  No need to break the bank buying amp A vs  a  lower priced kt88 amp B
CD players, nearly all  tube DAC's , tube cdp-ers sound  close. No need to braek the bank over X vs Y.
My Jadis DAC is  only miniscule gain over the Shanling,
 the Shanling
only a  miniscule gain over the Cayin CD17. 
Now as for  best source  , phonograph is the ideal playback medium vs cds. 
I have some LP's now , but my main collection are classical cds, most not on LP version. Cables , I did note some gains employing silver/copper wiring throughout my entire system including inside the Defy.
Tweak worthy.
New Mundorf caps in all componets, tweak worthy. 
Yet the main central component remaisn the speakers.
Here is where  the entire audio resolution either rises to Nirvana or falls to <<distortion/muddy waters,/pollution/anti-fidelity  voicing  issues.
Your system's fidelity is ultimately dependent on what speaker  you have chosen to employ.
Forget all you've learned over the years, 
The new mantra is <,The speaker is key component>
All else is just extra tweaks/nuances. 
To sum up, a  ~~SHF~~ driver will match even the top of line Wilson weighing in at hundreds of lbs priced $$$$$$$ overa single FR driver. 
FR beats out any/all xover box design speakers. Mostly due to that key specification ~~db level~~~ which is everything in speaker design and thus in resolution/fidelity. 

mozartfan
@Millercarbon --

When in reality: Imagine the perfect speaker

Sounds like an oxymoron to me, certainly the premise it forms:

... with the perfect speaker the speaker itself no longer matters. It is the components feeding it the signal that matters. Since you cannot hear the speaker then logically the only thing left to hear is the signal, which is running through all these other components.

Do you get it? All these other components are the amp, source, wires. The better the speaker the more these matter. So when you say the speaker is the most important, what you forget to leave out is it is only the most important when it is the worst component.

The better the speaker the less it matters and the more everything else matters.

What’s to get here, pragmatically speaking, is that the speakers (and acoustics) have always mattered the most to even approach "perfection," and trying to convince oneself we’ve actually accomplished that seems, if anything, unrealistic. Everything may matter to some degree, but certainly not all equally.
When I read the OP’s user name, I was expecting a different writing style.  In any event, speakers are just as important as the the rest of the components. 
I agree to a large degree with the comments about the room. In my experience I had a $20,000 speaker in a properly sized well treater room I moved the system to another location in the same space but lost the point of boundary reinforcement for the right speaker. All the dac, cable, and other tweaks I made became much less relevant to my ears in the new location. I can still get great sound and enjoy the system but it took going through this exercise to understand the importance or room reinforcement.  
Yes those drivers you mention are really fantastic.  Had this discussion with a local dealer recently regarding how he decides on a particular product line.  On of his comments were who makes the drivers.  In theory anyone can make any type of speaker cabinet and use drivers.  He likes the manufacturers who make their own drivers.  All things make a difference.  For example I would not use a Class D amp with a horn speaker.  If you like these speakers then set-up up to field coil designs.