Hi,

I have a pair of Behringer Truth B2031's (active), that tend to pick up
and amplify radio interference -- sometimes quite loudly. It wasn't a
problem for me before, but I recently moved to down-town Salt Lake City
-- a much busier environment.

Is there anything I can do to isolate these monitors so they won't pick
up the noise?

--
Dilvie on the web:
- http://www.dilvie.com/
- http://download-electronica.blogspot.com/
- http://movie-trailers.blogspot.com/

On 13 Jan 2005 16:34:08 -0800, "Eric" wrote:

Is there anything I can do to isolate these monitors so they won't pick
up the noise?

How well sealed are the casings? You'll need to improvise some sort
of shielding, inside or out.

Are you using them next to a computer monitor? Are the drivers
effecting the screen?

http://www.johnlsayers.com/phpBB2/viewtopic.php?t=297

Has a bit about halfway through about how to shield drivers that
aren't.
jtougas

listen- there's a hell of a good universe next door
let's go

e.e. cummings

In article .com writes:

I have a pair of Behringer Truth B2031's (active), that tend to pick up
and amplify radio interference -- sometimes quite loudly. It wasn't a
problem for me before, but I recently moved to down-town Salt Lake City
-- a much busier environment.

Is there anything I can do to isolate these monitors so they won't pick
up the noise?

What's the source of interference? Broadcast stations? Radio? TV? AM?
FM? Amateur/CB radio? Taxi/Police radios? Cell phones? Neon signs?

Do you get the interference on anything else in the house? TV sets,
telephones, fillings in your teeth?

You can use shielded cable for your connections (you probably already
are), you can use balanced connections, you can get a power line EMI
filter, you can get a better power line EMI filter, you can move.

Do the speakers pick up radio stations when they're just powered up
and not connected to anything else, or could the problem be somewhere
else in your system?



--
I'm really Mike Rivers )
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me he double-m-eleven-double-zero at yahoo

On Thu, 13 Jan 2005 22:47:41 -0500, jtougas
wrote:

Is there anything I can do to isolate these monitors so they won't pick
up the noise?

How well sealed are the casings? You'll need to improvise some sort
of shielding, inside or out.

Are you using them next to a computer monitor? Are the drivers
effecting the screen?

I'm not sure screening the speaker will make any difference. The
classic source of radio pickup is a bad plug connection acting as a
diode. Plug the speakers up to something else - is the radio still
there? What about if you monitor on headphones?

If you've moved next door to a transmitter, you may just have to move
again ;-)

CubaseFAQ www.laurencepayne.co.uk/CubaseFAQ.htm
"Possibly the world's least impressive web site": George Perfect

Is that the model with the built in FM tuner ??? :-)



Eric wrote in message
oups.com...
Hi,

I have a pair of Behringer Truth B2031's (active), that tend to pick up
and amplify radio interference -- sometimes quite loudly. It wasn't a
problem for me before, but I recently moved to down-town Salt Lake City
-- a much busier environment.

Is there anything I can do to isolate these monitors so they won't pick
up the noise?

--
Dilvie on the web:
- http://www.dilvie.com/
- http://download-electronica.blogspot.com/
- http://movie-trailers.blogspot.com/

They pick things up things like the microwave, paper shredder, and
miscellanious noises from outside, etc...

They pick up noise when they're not connected to anything, but they
tend to pick up more noise when I have them plugged into my mixer, and
I plug other things into it (even when the mixer input and output
volumes are zero). The mixer in question is an event ez-bus.

--
Dilvie on the web:
- http://www.dilvie.com/
- http://download-electronica.blogspot.com/
- http://movie-trailers.blogspot.com/

Eric wrote:
They pick things up things like the microwave, paper shredder, and
miscellanious noises from outside, etc...

They pick up noise when they're not connected to anything, but they
tend to pick up more noise when I have them plugged into my mixer,
and
I plug other things into it (even when the mixer input and output
volumes are zero). The mixer in question is an event ez-bus.

--


Usually RF interference gets into audio equipment via the audio cable
or via the power cables. Check the chassis ground connections on your
input and output cables.

It is unususual for RF to get in directly via the chassis. Usually you
have to be very close (1/2 mile) to the Tx for this to happen.

Mark

"Mark" wrote :

Usually RF interference gets into audio equipment via the audio cable
or via the power cables. Check the chassis ground connections on your
input and output cables.


Actually sound to me this guy has a probem with bad earthing and conductive
loads dirtying up his 'powergrid'..

--
Bill Gates can't guarantee Windows,
how are you gonna guarantee my safety..
--John Crichton - Farscape pilot

Paul van der Heu wrote :


Actually sound to me this guy has a probem with bad earthing and
conductive loads dirtying up his 'powergrid'..

Hmm should be inductive loads, not conductive..
--
Bill Gates can't guarantee Windows,
how are you gonna guarantee my safety..
--John Crichton - Farscape pilot