TT to another room, no vibs, better sounds?



Hi All,

A few years ago I thought I'd build a Turntable that is still about a year from being finished. The thought was mass is where it's at. If it's heavy it will take more energy to get it excited and vibrate.

After I picked up a few thousands dollars in parts my machinist asked me what I was trying to accomplish. My response was," The heavier it was the less it would vibrate."

He said, " Take it out of the vibrational environment and save money." I can do that soon and wonder if anyone else had the same thought and realized a cost effective improvement instead of spending more money on a better TT.

"Out of the mouthes of babes," Your thoughts,

ken
kftool
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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.
"i don't think tonearms are affected by air borne reasonace". Really. Read that vibrations too. Think about it, the interplay of the low mass tonearm and the room 'excitment' will make any plinth mass and its stand the least of your problems. Just hold you finger on the arm and you will feel the resonance and vibration. Since the cartridge is coupled to the arm, that is affected also. The Rockport at the Sony mastering facility in New York City, which Sony uses for extracting record source material for which the masters do not exist anymore, has no speakers in the room. All is done with headphones. Sony found that putting speakers in the room had a significant negative impact on the extraction process.
Everyone arrives at their own compromise as to how much trouble they are willing to go to in vinyl playback; for me if it is too inconvenient I will not use it as much.
Hi everyone,

I have been reading posts here for years, not having much that is new and useful to say. Maybe some will find the following approach useful:

When renovating our home we added a combined work/listening room with a suspended floor with an opening near one wall. This allowed a one ton concrete base (for my equipment stand) to be poured on the ground and be separate from all structures in the room. Cabinets were then built along that wall thereby enclosing my front end gear. The equipment stand space is lined with foam absorption.

This way I get effective isolation from structure borne vibration (at least from within the room) and some transmission loss from airborne vibration. I guess the cabinetry would offer reasonable WAF also. Fortunately I do not live near heavy industry or main roads or freeways.

I could make improvements with extra mass lining the MDF walls and doors of the equipment space. My equipment stand is nothing special - welded steel with sand filling where possible. No doubt this could be improved also.

I use tube power amps for my main speakers and found benefits in reducing microphonics by placing these power amps in with the front end as well. Fortunately they do not give off too much heat.