schoo
Joined: 15/01/06
Posts: 3
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Radio interence through my monitors. Can anyone help?
#237096 - 15/01/06 08:20 PM
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Artnoon! Just wondering if anyone knows how I can get rid of a very quiet, yet incredibly
annoying radio signal from my monitors? I have behringer truths and there is a constant
low-level interference. Thanks, Schoo
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John Willett
Sound-Link ProAudio
Joined: 07/03/00
Posts: 11963
Loc: Oxfordshire UK
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237135 - 15/01/06 10:15 PM
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Do they have a balanced input?
If so, make sure the XLR case is properly
shielded.
-------------------- John - Sound-Link ProAudio
President - Federation Internationale des Chasseurs de Sons
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Aural Reject
Joined: 02/05/03
Posts: 4207
Loc: Lancashire
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Re: Radio interence through my monitors. Can anyone help?
[Re: John Willett]
#237139 - 15/01/06 10:20 PM
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Quote John Willett:
Do they have
a balanced input?
If so, make sur ethe XLR case is properly sheodded.
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Scottdru
Cool Dude
Joined: 17/12/02
Posts: 4392
Loc: NYC: isle off the coast of Eur...
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237147 - 15/01/06 10:28 PM
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John Willett
Sound-Link ProAudio
Joined: 07/03/00
Posts: 11963
Loc: Oxfordshire UK
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Re: Radio interence through my monitors. Can anyone help?
[Re: Aural Reject]
#237160 - 15/01/06 10:39 PM
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Quote Aural Reject:
Quote John Willett:
Do they
have a balanced input?
If so, make sur ethe XLR case is properly sheodded.
OK, OK - too much vino tonight -
corrected now.
--------------------
John - Sound-Link ProAudio
President - Federation Internationale des Chasseurs de Sons
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Aural Reject
Joined: 02/05/03
Posts: 4207
Loc: Lancashire
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Re: Radio interence through my monitors. Can anyone help?
[Re: John Willett]
#237162 - 15/01/06 10:42 PM
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LOL- mine was last night. And you going back to work this week  Drinking on
a school nite 
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PWGLE
Joined: 04/05/03
Posts: 3439
Loc: UK - Cardiff/Bath
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Re: Radio interence through my monitors. Can anyone help?
[Re: John Willett]
#237164 - 15/01/06 10:46 PM
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 Its Soo! Have you checked your leads, and the power leads are properly grounded. Try a different
source to determine wether its the speakers, or whats feeding them.. Good luck
Soo... Laurence
-------------------- P.I.G.L.E.T - where is polly?
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Hugh Robjohns
SOS Technical Editor
Joined: 25/07/03
Posts: 18399
Loc: Worcestershire
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237341 - 16/01/06 10:32 AM
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If memory serves, this isn't the first thread we've had about B Truths suffering from RFI.
I'm pretty sure we have had several other occurences of this, with no cure found other
than selling the Truths and buying something better. ... or did I just dream it
 hugh
-------------------- Technical Editor, Sound On Sound
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Martin Walker
Watcher Of The Skies
Joined: 28/02/01
Posts: 16393
Loc: Cornwall, UK
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Re: Radio interence through my monitors. Can anyone help?
[Re: Hugh Robjohns]
#237583 - 16/01/06 05:41 PM
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Was that the same dream you had where every forum user had fitted acoustic treatment in
their studio, tracked down and eradicated every single ground loop in their wiring, and
bought PMC speakers? Martin
-------------------- YewTreeMagic
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David Lewthwaite
Joined: 09/01/05
Posts: 627
Loc: On the Wirral these days
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237630 - 16/01/06 06:59 PM
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Oh now come on....the truths arnt that bad....though admittedly i wish i'd bought the
tannoy reveal passives + amp (same cost at the time) but still - i dont get RFI anyway
-------------------- David Lewthwaite, www.lewty.org.uk, dave@lewty.org.uk
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schoo
Joined: 15/01/06
Posts: 3
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237692 - 16/01/06 08:49 PM
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Cheers guys!! Will try those suggestions. We also got RFI through a couple of different
electric guitar pick-ups. And the Harbingers, I mean Behringers aren't that bad! A world
away from our old yellow KRK's with the blown speaker! In fact, we did a session the other
day with a 19 year old girl with a truly stunning voice and realised that every step of
the recording chain was Behringer! And it sounded lovely. Cheers peeps. Schoo
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Scottdru
Cool Dude
Joined: 17/12/02
Posts: 4392
Loc: NYC: isle off the coast of Eur...
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#237702 - 16/01/06 09:08 PM
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Quote schoo:
Behringers aren't
that bad! A world away from our old yellow KRK's with the blown speaker!
LOL. Love the comparison, tho. Class. 
(I know I should be ashamed of myself for taking the piss and not being helpful
at all. Do note that it's all in good fun, and we all understand the position of
operating under budget constraints -- and that includes myself in particular.)
Do try to isolate the monitors and see if you can verify whether the problem is indeed
the monitors or perhaps the RFI is coming in through the cables or some other place.
Also, are your monitors plugged into a surge supressor that has RFI filtering?
It sounds like you must have a radio broadcast tower somewhere nearby. It is also
possible that your mains wiring and/or the power input cord of the monitors are acting as
antennae. Any info you can supply is with *may* be helpful.
Hope you can get
this sorted. It will be great if you don't have to replace the monitors, but, as has
already been said, it also won't be surprising if the problem is indeed the a result of
typical Behringer engineering not being particularly tolerant of less optimal
environmental circumstances.
If it turns out to be an unrepairable problem,
perhaps replacing the drivers in the KRKs might be (or have been) a better option? Just a
thought.
--------------------
Scott
--Where are we going and why am I in this handbasket?
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schoo
Joined: 15/01/06
Posts: 3
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#238803 - 18/01/06 05:21 PM
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Cheers mate! Wasn't getting arsey by the way! I re-read my post and realise it may have
looked that way- if so sorry!!  Will
definitely check out your ideas. Thanks for your help. Schoo
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The Byre
Joined: 27/03/05
Posts: 1674
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#238900 - 18/01/06 08:48 PM
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Quote schoo:
Artnoon! Just
wondering if anyone knows how I can get rid of a very quiet, yet incredibly annoying radio
signal from my monitors? I have behringer truths and there is a constant low-level
interference. Thanks, Schoo
Ahhh, the pleasures of owning Behringer kit (Behringer Kitt, mein Gott! Und wie ich die
Frau liebte!)
--------------------
www.the-byre.com No longer Forum Member
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PWGLE
Joined: 04/05/03
Posts: 3439
Loc: UK - Cardiff/Bath
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Re: Radio interence through my monitors. Can anyone help?
[Re: The Byre]
#238910 - 18/01/06 09:17 PM
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You checked the RFI isn't being picked up on the input stage? If it is, its
pretty easy to built a little RFI removal box with all of 3 components! Laurence
-------------------- P.I.G.L.E.T - where is polly?
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Simon (aka UK03878)
Joined: 02/11/05
Posts: 1504
Loc: Munching a Carrot, The Fens
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Re: Radio interence through my monitors. Can anyone help?
[Re: schoo]
#239059 - 19/01/06 08:57 AM
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I'm just a year into my DIY ELectronics bits'n'bobs - but isn;t one of the solutions to
this is to add a inductor somewhere in the signal path
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John Willett
Sound-Link ProAudio
Joined: 07/03/00
Posts: 11963
Loc: Oxfordshire UK
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Re: Radio interence through my monitors. Can anyone help?
[Re: ]
#239081 - 19/01/06 10:02 AM
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Canford Audio do little in-line RF filters - XLR-3F to XLR-3M - very useful, I have 4 in
my kit.
-------------------- John - Sound-Link ProAudio
President - Federation Internationale des Chasseurs de Sons
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PWGLE
Joined: 04/05/03
Posts: 3439
Loc: UK - Cardiff/Bath
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Re: Radio interence through my monitors. Can anyone help?
[Re: ]
#239085 - 19/01/06 10:12 AM
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Quote Simon (aka UK03878):
I'm
just a year into my DIY ELectronics bits'n'bobs - but isn;t one of the solutions to this
is to add a inductor somewhere in the signal path
Normally a choke, and then a small cap across the two lines...
If you fancy going a step further its pretty easy to add a isolation transformer
as well.
Laurence
--------------------
P.I.G.L.E.T - where is polly?
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yorkio
new member
Joined: 03/11/03
Posts: 373
Loc: Gateshead
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Re: Radio interence through my monitors. Can anyone help?
[Re: Designnotes]
#239179 - 19/01/06 12:48 PM
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I had the same problem with a pair of Event TR5s and it drove me absolutely round the
bend! After all manner of faffing about, the solution for me was actually just a bit of
cable management - if the audio cables went anywhere near power cables or the case of my
Mac, it was instant Radio 2, but they're nice and quiet if I keep them well clear.
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PWGLE
Joined: 04/05/03
Posts: 3439
Loc: UK - Cardiff/Bath
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Re: Radio interence through my monitors. Can anyone help?
[Re: yorkio]
#239446 - 19/01/06 07:15 PM
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The general rule with power and audio cables is cross them at right angles.
Laurence
--------------------
P.I.G.L.E.T - where is polly?
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artbreak
Joined: 18/11/05
Posts: 226
Loc: Austria
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Re: Radio interence through my monitors. Can anyone help?
[Re: Designnotes]
#239471 - 19/01/06 08:00 PM
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Quote PGWLE - Pirate Giant with Laser
Eyes:
The general rule with power and audio cables is cross them at
right angles.
Laurence
only if you really have to cross them or keep them at least 50cm apart left/right or
above and below it does´nt really matterhttp://www.soundonsound.com/images/forum/icons/smirk.gif
smirk
--------------------
I could´nt sleep till I put it down
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