Help!! Commercial Radio on my Monitors!!

Discussion in 'Monitoring' started by funkface42, Aug 8, 2007.

  1. funkface42

    funkface42 Guest


    Here's my studio problem, I can hear a commercial radio signal on my Genelec 8040 while I recording vocal!! sometimes it can bee heard on My amps with a lot of it Ground loop problems or what?? please Help


  2. Space

    Space Well-Known Member

    Jun 26, 2007 sounds like you recognize the station. Is there another radio tuning device located in another part of the dwelling(or a near by dwelling) that is on and could be creating this unwanted sound? When you use headphones can you still hear it?

  3. pr0gr4m

    pr0gr4m Well-Known Member

    Feb 9, 2005
    South Florida
    Home Page:
    It's something picking up RF. It could be a cable or device or a combination of things or it could be happening because the way the different devices are connected and/or the different types of cables used. Basically, there's lots of things that could contribute to this sort of problem so you'll need to do some troubleshooting.

    A ground loop problem would likely cause a completely different type of annoyance.

    Do you live close to the broadcast tower? If so, that may be it right there. The signal is strong and your electronics are not shielded enough to block it.

    Here is what I recommend you do to troubleshoot the problem. Set up the simplest chain of devices that you can to recreate the problem. You said that you can hear it in an amp. That would likely be the simplest to test with because it would be just a guitar plugged into an amp.

    So, hook that up and crank the gain until you hear the radio. Unshielded or poorly shielded cables can pick up RF signals. Unplug the guitar leaving the cable plugged into the amp. Still hear the radio? If so the problem could be that the cable is picking up the RF signal. Unplug the cable from the amp. Still hear the radio? If not, run the same test using different cables. Use different lengths if you have them. Shorter ones may have better results. You may want to buy a good shielded cable to test with.

    If you didn't hear the radio after unplugging the guitar, plug the guitar in using a different cable. It may be that the guitar is picking up the RF signal.

    You can do the same sort of test with your 8040s.
    You did mention that it happens when you record vocals. Is it only when you record vocals? Do you use a specific mic or cable when recording vocals? How long is the mic cable? If you unplug the mic, do you still hear the radio? If you have devices hooked up between the mic and monitors, eliminate they as possbilities by bypassing as many of them as you can.

    Good luck.
  4. funkface42

    funkface42 Guest

    Thanks 4 replying :)

    There are at least 5 stations around my studio, about 2-3km away each. Only 1 radio signal leaked to my 8040 and It came from more far Radio station :(
    I use U87 for Vocal (the broadcast signal is more Louder then C42 Jossepson), 10m Mogami cable
    Patch bay?? Should I bypass it?

    Need more help :cry:
  5. Link555

    Link555 Well-Known Member

    Mar 31, 2007
    North Vancouver
    Did you try swaping cables?

    could be a ground connection has broken, on the mic or cable.
  6. funkface42

    funkface42 Guest

    Yes, I tried every cable I have,.but the signal still there.
    Last time I checked,.I can hear the signal on Amps without plugin the cable.. :cry:
  7. Boswell

    Boswell Moderator Distinguished Member

    Apr 19, 2006
    Home Page:
    Try a clamp-on ferrite on the mains lead right next to the amplifier inlet, and then another on the microphone cable next to the XLR connector on the amp.
  8. funkface42

    funkface42 Guest

    I've tried with Toroid once but not working..Btw I'll try with ferrite thank alot :wink:
  9. funkface42

    funkface42 Guest

    I've tried with Ferrite (I clamp everywhere), but the Radio signal still there :(
    Any help??
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