I don't subscribe to the 'golden ears' concept. A listener is a listener is a listener. With a lot of experience in critical listening, the skill set becomes more attuned and nuanced, in the same way that a wine taster's nose and palette become more attuned and nuanced over time. This does not mean their nose and tastebuds improve over time, but rather their ability to put those trained senses to good use and to consistently recognise wines that would taste functionally identical to the neophyte. Yes, there are always outliers; bat-eared types who retain the hearing acuity of an eight year old into their dotage and people who spent their formative years in front of The Who's PA system. Most of us are toward the middle of the bell-curve.
Intuitively, I'd say having a recording or musical background is an advantage to reviewing audio equipment. Certainly there are a lot of musicians (especially guitarists, it seems) who write about audio. However, a musician's ear training has little in common with the ear training required by a studio engineer (the former might place emphasis on musical interval, the latter on EQ), and an audiophile's training program (like the one developed by Harman) should be geared toward audio-specific aspects such as identifying system-related coloration, and I'm not sure how relevant the training in one discipline would be to the others. I don't think cross-platform skills would necessarily be a hinderance, unless the individual was so tied to one kind of ear training as to render them useless in all others (e.g., a musician who thinks that, because their training was all about being able to tell one note is two full tones higher than another without having to sing the Do-Re-Mi song from The Sound of Music to themselves, musical interval is the only currency in recorded music).
Knowledge is power though, and having an understanding of the nature of the instruments being played and how the sound of those instruments is shaped by the studio process is extremely useful knowledge for an audio reviewer.
Intuitively, I'd say having a recording or musical background is an advantage to reviewing audio equipment. Certainly there are a lot of musicians (especially guitarists, it seems) who write about audio. However, a musician's ear training has little in common with the ear training required by a studio engineer (the former might place emphasis on musical interval, the latter on EQ), and an audiophile's training program (like the one developed by Harman) should be geared toward audio-specific aspects such as identifying system-related coloration, and I'm not sure how relevant the training in one discipline would be to the others. I don't think cross-platform skills would necessarily be a hinderance, unless the individual was so tied to one kind of ear training as to render them useless in all others (e.g., a musician who thinks that, because their training was all about being able to tell one note is two full tones higher than another without having to sing the Do-Re-Mi song from The Sound of Music to themselves, musical interval is the only currency in recorded music).
Knowledge is power though, and having an understanding of the nature of the instruments being played and how the sound of those instruments is shaped by the studio process is extremely useful knowledge for an audio reviewer.