My sacrilegeous question to audiophiles out there regarding parametric equalizer.

@tubelvr1
To get back to your original question, it seems unlikely that an external analogue equalizer will enhance detail—if anything, it might actually reduce it, which is what happened to me when I tried it years ago.This is because you are introducing an additional circuit — and some distortion — into the reproduction chain; also, you know that you cannot enhance what is not there, you can only reduce the remaining elements to forge a new sonic balance if you will. There are extreme analogue equalisers out there, of course (FM acoustics comes to mind), but these come at equally extreme prices!
All of this differs from what other posters above are discussing, i.e. the merits of changing components in a specific circuit, like tube rolling, for example—that you could try, if you’re using tubes that is.

Or, you could just different speaker placement - closer to the front wall could enhance bass while further apart and away from the wall may enhance detail & soundstage because bass notes will be less pronounced, bringing the mids & highs into the forefront...

Normally in High-End home system we don't need an EQs, because everything is just great. The shortest signal path is the way to go. However, we change cartridges, tonearms, cables, amps, preamps to find what's the best. 

But for professional application EQ can help to quickly adjust the sound in a certain room such as a bar, club or whatever place where people playing records in public. In such places you need to quickly adjust everything, this is a compromise. Some public places are terrible in terms of room acoustics and the EQing sometimes can help. So in my opinion EQ is for professionals, not for Audiophiles. 

However, i rebember all those Hi-Fi home systems from the 80's with EQ and it was fun to play with it, i've been using EQs when i listeted to cassette tapes as a teenager. 

EQ in Audiophile's home is like too much spices in the good food. 

One of the basic elements of music is tonality.  Why audiophiles are so reluctant to directly alter tone is a mystery to me.  I imagine if someone had a perfect room and their loudspeakers perfectly interacted with that perfect room, then perfectly recorded music would never need tonal adjustments in that situation.

@onhwy61 Bingo! 

However it’s not that they are reluctant to alter the tone, it’s that they are reluctant to admit that by constantly box swapping thats exactly what they are doing. Afraid of getting their audiophile card revoked I suppose.