Because I hear the term abused so much let me set the record straight.
Color management DOES NOT INCREASE THE GAMUT OF THE OUTPUT DEVICE.
You can use EFI, KEPS, Colorblind, your mama's color management or
whatever you wish but...
you can spend a billion dollars on spectrophotometers...
Yo can embrace ICC or whatever...
The available gamut of the output device is inherent in the device.
What you can hope for is that a color management system will show you on
your monitor an accurate representation of the output gamut. Then you
can work within that limits of that device.
I am beginning to think that the term "calibrate" means to color
correct. That by calibrating you can make any printer match any
Calibrate = "bring to known position."
That position may not be acceptable but it is the "KNOWN" position.
If anything, what calibration gains you is the ability to "predict."
And that's not a bad thing to gain.