The key phrase is "high end amplifier."
Having owned Crown and other pro-audio sound-reinforcement amps when I was a recording musician/engineer, I would not characterize them as "high end." They did what they were meant to do - a relatively compact package providing lots and lots of power for PA systems and stage monitors. They were never meant to be the last word in refinement of audio quality, which is what a "high end" amplifier is meant to be.
Having owned Crown and other pro-audio sound-reinforcement amps when I was a recording musician/engineer, I would not characterize them as "high end." They did what they were meant to do - a relatively compact package providing lots and lots of power for PA systems and stage monitors. They were never meant to be the last word in refinement of audio quality, which is what a "high end" amplifier is meant to be.