Turntable feedback from nearby speaker

[amdx]

wrote in message


I'm reminded of the old joke

Well, if you're going to go there,
He needs some noise cancelling speakers, that cancel
at the turntable.
Mikek

 

[Phil Allison]

"dave"

Why not fly the speakers?

** IT MAKES NO DIFFERENCE !!




.... Phil

 

[William Sommerwerck]

I have one of the following. In fact I suggested the name to the manufacturer
(or encouraged him to keep the name, I forget which).

http://www.head-fi.org/t/408141/sold-arcici-lead-balloon-turntable-stand-rare

https://www.google.com/search?q=lea...DpPjoATFt4LABA&ved=0CFYQsAQ&biw=1607&bih=1060

It sits next to the left-rear speaker, and I have no problems.
(Qualification... My speakers are planar dipoles, and the stand is not far
from the lateral null.)

 

[Phil Allison]

"dave"

How many discoteques have you built, Phil?

** I used to build custom disco consoles for a living and designed and
prototyped a disco mixer that went into production.

For a long time, most of my customers were in the disco hire business, now
only few are.

But there is not much similarity between disco and home stereo systems -
which I have huge experience with.

And YOU seem to have no experience or knowledge of either.

So go **** yourself - cunthead.



..... Phil

 

[Maynard A. Philbrook Jr.]

"dave"



** I used to build custom disco consoles for a living and designed and
prototyped a disco mixer that went into production.

For a long time, most of my customers were in the disco hire business, now
only few are.

But there is not much similarity between disco and home stereo systems -
which I have huge experience with.

And YOU seem to have no experience or knowledge of either.

So go **** yourself - cunthead.

Yeah, what Phil says, pubic hair!

Jamie

 

[Phil Allison]

"dave the fuckwit troll"

** You are a complete fool and a damn liar - dave.

He says to the man who for years would seek out a living room with a
concrete floor so I can play my vinyl louder.

** Lie #1

Rooms with concrete floors can still have BIG problems with TT feedback at
low frequencies.

Decoupling the speaker from the phono cartridge at the natural resonant
frequency of the system is essential. Usually this frequency is lower
than the LF cutoff off the transducer/cabinet making sound so the LF
feedback transmission mode is through objects more solid than air. If both
speakers and TT are on a giant cement slab with great mass, nothing
vibrates except the speaker cones in the air and the stylus.

** Total pack of stupid lies.

If the floor is wood over joists the room turns into a giant sounding
board. Vibrations from the speakers easily overcome the damping mechanism
in the turntable and the speaker cones start flapping in unnatural efforts
to reproduce the infrasonic.

** More stupid lies.

TT feedback is not subsonic, it is audio frequency and is due to sound
pressure induced vibrations in the room's structure.

I have never turned up the gain enough to make the stylus feedback in free
air;

** HUH ???

Not even resting on the record?

it is almost always a mechanical path. Speaker to floor. Floor to
turntable. Floors also couple to walls, walls to the ceiling; but there is
enough attenuation in this mechanical path to allow the damping in the
turntable base to take care of the residual vibrations.

** More total crap.

You can hang the speakers ....

** Has no effect on TT feedback - you lying asshole.

In commercial applications too numerous to mention I have left a trail of
weird fixes (and several tons of bagged Redy-Mix concrete) in my wake.

** And all along, the only thing that was ever needed was a few coil springs
under the TT. .

Now, being the "**** head" that I am, off to go **** myself.

** ROTFL !!

You have been totally FUCKED for the whole of you miserable life - asshole
..

Cos you were a genetic mental retard from birth.



..... Phil