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I Have Airborne Feedback And Never Realized It...Till Now

  While my ZYX Airy is out for a rebuild, I hooked up my CAL cd player/transport and started playing CD`s that I had recorded from vinyl using a Tascam 900.
When I do the recording, nothing is on but the TT setup and the recorder. Room is dead silent. No speakers

I`ve  been listening to a disc or two over the last few nights.

Last night, I was listening to a CD I made of Lindsey Stirling`s 'Shatter Me' LP
I was hearing so many odd/different sounds that I never picked up on before using the TT.

For example, I heard growling sounds (seriously) back ground noises and other THINGS that all were hidden when I was playing the TT.
This LP is Bass Heavy! Lots of energy in the air. With 3 15" subs I know that.

My TT is pretty much isolated IMO
I use a Rega wall mount bracket that is bolted to my equipment rack not the wall.
I have the TT sitting on a SRM isolation platform that sits on the Rega bracket
Concrete slab floor.

No doubt the cartridge is picking up on all energy that and resubmitting it.

This won`t be an easy fix I`m afraid..  :(



scm
millercarbon's avatar
millercarbon
12,531 posts
 
I remember back when I used to record my lp`s to cassette, I could very  loudly talk right at the cartridge while recording and I could hear my voice on the tape afterwards.
That's what is happening here I`m pretty sure.
It's not mechanical IMO

So you're sure the one rules out the other. Interesting.

mapman's avatar
mapman
21,835 posts
 
If you have concrete floors at foundation level you are good to go there.

Turntable just needs a solid foundation on top of that. and that should cover it.

For example my table (Linn Axis...pretty robust on its own) sits on a low solid oak wooden table on top of concrete foundation with thin dense carpet and padding. Rock solid! Nothing picked up from speakers or sub between which it sits. First time ever I’ve achieved that! Never had the solid concrete foundation to work with prior.



scm OP
295 posts
 
I`m sure things would improve if I could put the TT in another room but that would be impractical.

Fortunately I listen at very modest levels..
Maybe, I can put some treatment around the TT and see how that goes.

 
Ag insider logo xs@2x
rauliruegas
12,779 posts
 
Dear @scm  : Looks as you are rigth, it's through the air and picked up by the cartridge/tonearm.

As you said it it's not easy to fix it other than change the TT positon or even its shape/angle position.

Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
millercarbon's avatar
millercarbon
12,531 posts
 
Here is Max Townshend stamping his foot on the floor, proving once and for all vibrations travel just fine through solid concrete. https://youtu.be/BOPXJDdwtk4?t=86 

I am constantly astounded at the ability of people to ignore solid evidence and persist in wrong thinking, even to the point of talking about moving a turntable to a whole different room, rather than just try what has actually been shown to work. The guy repeating the concrete good to go BS knows it is BS, but keeps repeating it. The guy talking about moving his turntable to another room can solve his problem with some $30 Nobsound springs or even a $5 box of sand. But no, the Good Ship Nonsense has a full head of steam, full speed ahead! Absolutely amazing.
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