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Isolation, Tips & Tweaks Enhance your enjoyment

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  #11  
Old 11-09-2018, 03:45 PM
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Originally Posted by Poppyhome View Post
Hey Dan, I'm not a structural engineer, but my experience is the exact opposite. My turntable is mounted to the second and third studs perpendicular to the center structural beam of my house with wooden floors.

Zero vibration to my turntable and jumping up and down causes no issues. Footfalls are known problems for turntables on stands though and not for turntables mounted to perpendicular walls.

As for wall induced vibrations, I don't know what that is compared to floor induced vibrations and my subwoofer is on the floor.

Ron
Different placement locations can have different resonance points. So while there may be an improvement in one area (such as foot traffic), walls usually have a higher resonant frequency than flooring which means the turntable can be more susceptible to acoustic feedback when wall mounted - unless specific steps are taken in the wall construction to prevent it.

Everything is a trade off in audio.
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  #12  
Old 11-09-2018, 04:05 PM
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Originally Posted by 62caddy View Post
Different placement locations can have different resonance points. So while there may be an improvement in one area (such as foot traffic), walls usually have a higher resonant frequency than flooring which means the turntable can be more susceptible to acoustic feedback when wall mounted - unless specific steps are taken in the wall construction to prevent it.

Everything is a trade off in audio.
What is a higher resonant frequency, what does acoustic feedback sound like, and is there a study on how it effects audio sound for the worse.

What about all the sound waves bouncing around the room and hitting the poor turntable or component with a direct hit?

Ron
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  #13  
Old 11-09-2018, 04:48 PM
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Originally Posted by Poppyhome View Post
What is a higher resonant frequency, what does acoustic feedback sound like, and is there a study on how it effects audio sound for the worse.

What about all the sound waves bouncing around the room and hitting the poor turntable or component with a direct hit?

Ron
Acoustic feedback usually sounds like a low/mid-low frequency "howl" as it cycles from the speakers which in turn resonates the turntable and back through the speakers. Depending on the volume setting, it can quickly increase in intensity resulting in damage if immediate action isn't taken. When it occurs, it's unmistakable.

Different turntable locations can have dramatic effects on the amount of feedback being introduced into the system (at a given volume setting), ie: such as in corners where bass is most pronounced or simply from the turntable being too close to the speaker(s).

Most reasonably good turntables will not be affected by the predominant frequencies in most music because they are too high however in some rare cases a low tone (if it's loud enough) can trigger mechanical resonance, thus initiating audible feedback. In less severe cases, the low tone will continue longer (hold on) through the speakers even though it had stopped in the music.
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Last edited by 62caddy; 11-09-2018 at 04:51 PM.
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  #14  
Old 11-09-2018, 05:11 PM
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Thanks for the awesome explanation.

No feedback issues for me and my turntable is 1-2 feet from my left speaker.

Must be because its wall mounted.

Ron
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  #15  
Old 11-09-2018, 05:26 PM
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Originally Posted by Poppyhome View Post
Thanks for the awesome explanation.

No feedback issues for me and my turntable is 1-2 feet from my left speaker.

Must be because its wall mounted.
Either that or you simply have a really good turntable!

The ultimate test is if the turntable can be placed on the speaker without feedback.
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  #16  
Old 11-09-2018, 07:31 PM
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I have wondered if hanging the rack I from the ceiling would be any good.
Maybe have springs on cables to help with isolation?
I wonder if it has been do e and if it was a success.
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  #17  
Old 11-09-2018, 08:05 PM
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Quote:
Originally Posted by vegaracer1 View Post
I have wondered if hanging the rack I from the ceiling would be any good.
Maybe have springs on cables to help with isolation?
I wonder if it has been do e and if it was a success.


It works for babies!
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  #18  
Old 11-09-2018, 08:10 PM
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Quote:
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It works for babies!
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  #19  
Old 11-09-2018, 08:26 PM
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That woman won't be smiling so broadly when the few finish nails holding that molding in place let go and the trim flies off the wall along with the baby hitting the floor.
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  #20  
Old 11-09-2018, 08:41 PM
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My components are my babies.
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