well, ok. my three tt's are on the top shelf. but it's not that simple.
2 issues with rack height and turntables. one is very obvious.
---your turntable needs to be at a height where you can most comfortably see what you are doing while setting up a cartridge, and where you can have proper sight lines. and if it's too low then as you age you will less and less want to take proper care. it will also depend on your expectations as to set-up perfection. my tone arm designer (a local friend) many times comments how easy and natural my turntable height is for him to easily tweak the set-up.
i know people who's back or neck needs a week to recover from setting up their cartridge. life is too short. something in that equation....gives.
---and generalizing about
lower tt height sounds better misses the mark. you have to factor your floor construction, proximity to your speakers, how dynamic and how much deep bass your speakers produce, the rack type (isolating or solid), and your turntable plinth design......is it suspended or not? a tall solid, high mass, rack on a concrete floor will yield much better results than a cheap low rack on a suspended wood floor. better yet; your tall rack is mass loaded, and maybe you use a Stacore air suspension shelf, or better yet, and Taiko Tana active shelf.......and height no longer matters.......at.......all......as far as performance.
some racks are very solid when they get taller, some are not. it.....depends.
btw; there are no rules, tt fun is where you find it, and everyone has a different set of priorities. so i'm only commenting from the perspective of desiring un-compromised performance. YMMV and just my 2 cents.
my racks allow for the perfect working height. you are never hunching over and straining.......and are mass loaded onto a concrete floor and the tt closest to my speakers has active isolation.
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