i've had my Rockport recorded with the speakers at high volume and then while monitoring with headphones. at least with redbook level recording there was no audible difference. but that's the Rockport with SOTA isolation designed into the tt.
my other 2 tt's are sitting along the sidewall next to one speaker. my Grand Prix Audio Monaco stands and Formula shelves use passive decoupling to isolate floor borne vibrations from gear. it works pretty good. every 9 months to 1 year i renew the sorbothane discs under the shelves, and i can hear the improvement.
i do have a 6" concrete floor, and my speakers are sitting on decoupling footers. so floor borne reasonance is dealt with at the source quite well.
as far as air borne resonance affecting a tt; it likely depends on the tt, and the amount of mass in it's plinth. both my other tt's have high mass plinths (75 and 110 pounds) and i doubt are affected by mid and and high frequency air borne reasonance. i don't think tonearms are affected by air borne reasonaces. i would grant that any sound will have some affect. the question would be; is the affect audible? could you record it with and without your speakers playing and hear a difference? i doubt it.
my opinion would be that the complication of having a tt in another room, both in cable lengths and usability, would far outweigh negatively any potential benefits assuming a reasonable level of isolation in your rack, and solid floor, and a high mass plinth.
and then there is the main issue; you will listen to less vinyl if it's a pain in the ass.
my other 2 tt's are sitting along the sidewall next to one speaker. my Grand Prix Audio Monaco stands and Formula shelves use passive decoupling to isolate floor borne vibrations from gear. it works pretty good. every 9 months to 1 year i renew the sorbothane discs under the shelves, and i can hear the improvement.
i do have a 6" concrete floor, and my speakers are sitting on decoupling footers. so floor borne reasonance is dealt with at the source quite well.
as far as air borne resonance affecting a tt; it likely depends on the tt, and the amount of mass in it's plinth. both my other tt's have high mass plinths (75 and 110 pounds) and i doubt are affected by mid and and high frequency air borne reasonance. i don't think tonearms are affected by air borne reasonaces. i would grant that any sound will have some affect. the question would be; is the affect audible? could you record it with and without your speakers playing and hear a difference? i doubt it.
my opinion would be that the complication of having a tt in another room, both in cable lengths and usability, would far outweigh negatively any potential benefits assuming a reasonable level of isolation in your rack, and solid floor, and a high mass plinth.
and then there is the main issue; you will listen to less vinyl if it's a pain in the ass.