I’ve only come across one professional classical musician who is an audiophile, to the extent that he also reviews audio equipment.
I’ve no doubt that professional classical musicians have an acute sense of hearing, and I recall that Arthur Rubenstein insisted that Steinway provided three pianos at the concert hall for him to choose from. But this is not necessarily a special gift. I’ve been to piano masterclasses and when the piano maestro points out to the student the smallest changes in how a few notes should be played, it is quite obvious to the amateur.
On my occasional interactions with professional musicians I don’t think I’ve ever had a single discussion that touches on audio equipment.
What is curious about the video posted above is that Paul, with almost 50 years in the business, does not refer to having discussed the issue with any classical musicians, he just speculates.
My personal view is domestic audio is largely irrelevant to to professional musicians because when you have constant access to performance, your own or others, why listen to recordings? Even then, you don’t need high end audio and care over cable choice to get to hear differences in performance on recordings.
I met the aforementioned musician/reviewer when he came to buy my Quad ESL63 for his son to use to listen critically to recordings. His son is a young professional pianist and conductor. Quad ESL63 were in his opinion the perfect speaker for the task of listening to orchestral music because they are so detailed and image so well. I sold them for £1,100, about $1,500, recently restored and in perfect condition. He told me they were going to be used with a fairly basic amplifier, the whole system costing about $3,000.
My issue is that this whole “trained listener” thing is just another audiophile myth along the premise that that if you can’t hear that one product is better than another, it’s down to your failings as a listener rather than the product. Consequently only “trained listeners” can properly evaluate products and untrained listeners should take their word for it.
Sure, some people spend more time listening, and others listen more intently, but I think @wijber summed the whole thing up succinctly.