Currently Being ModeratedJan 18, 2012 11:55 AM (in response to seanbaker1)Re: Problem connecting HD500 to an amplifier
What output are you using? You should be using the 1/4 outputs (not the headphone out). Also check the levels. It could be that you are too hot out. Other than that it shouldn't be a problem.
Currently Being ModeratedJan 18, 2012 12:54 PM (in response to jasonbogen)Re: Problem connecting HD500 to an amplifier
Yes, I'm using the 1/4" output. I've tried changing the levels on the HD500 using the Master volume, volume knob, volume pedal (when configured), etc. No matter what I always get a steady bshzzzzzzzz sound. I must be missing something fundamental!
Currently Being ModeratedJan 18, 2012 7:21 PM (in response to seanbaker1)Re: Problem connecting HD500 to an amplifier
In my latest test to figure out what I'm doing wrong, I plugged a high-quality 1/4" cable from the 1/4" out on the HD500 to an M-Audio monitor, no guitar plugged in at all. Complete silence. I unplug it from the monitor and plug it into either the Spider III or the AC-90, and I get the same faint high-pitched sound with lots of static, regardless of the levels on the HD500. The sound is the same even if the Master vol is all the way down! What's worse, the high-pitch and static remains if I power off the HD500!
I know I must seem like an idiot, but can anyone point me to what I'm doing wrong?
Currently Being ModeratedJan 19, 2012 5:52 AM (in response to seanbaker1)Re: Problem connecting HD500 to an amplifier
Can't say 100% but it sounds like it might be a ground loop to me. There are a couple of things you can do about this:
- Make sure both the amp and Pod are plugged into the same power strip. This can help sometimes.
- Transfer the power strip to another wall socket.
- Try a hum cancelling transformer (e.g. an EbTech Hum Eliminator or Behringer HD400). See this thread -> http://line6.com/support/thread/72086
- Try breaking a cable ground - if you have an old, manky cable that you can afford to lose then this may be an easy test ... just break the cable ground at one end. Details on my experience are here http://line6.com/support/thread/72223
Currently Being ModeratedJan 20, 2012 5:46 PM (in response to seanbaker1)Re: Problem connecting HD500 to an amplifier
Oh good grief, I figured it out! I tried plugging everything into the same power strip as suggested, still heard the buzzing. Woke up my sleeping laptop to read this post again and see what else to try, and the buzzing went crazy! I always have the computer plugged into the HD500 with a USB cable so I can use the editor. I unplugged the USB cable from the HD500, and silence from both the Spider III and the AC-90!
I have to think that this is a common problem? I can live without the USB plugged in, just wonder if there's a way to keep it all hooked up without the buzz. Maybe need a better-shielded USB cable? I'm using the one that came with the HD500.
Currently Being ModeratedJan 21, 2012 1:16 AM (in response to seanbaker1)Re: Problem connecting HD500 to an amplifier
Yes this is a common problem when you connect the POD to an amp which is grounded AND a computer which is grounded too. Happens with older PODs too. If your computer is a laptop, it probably has a PSU with a third pin/wire for ground from the mains electricity supply. You can source a replacement compatible PSU which only has a two core mains cable requirement and this should resolve the issue or you can run the laptop on battery power for short stints.
You can also break the ground loop between the amp and POD by using a 1:1 audio isolating transformer like the Behringer HD400 Hum Destroyer as Jim already suggested and this should also resolve your issue.
Currently Being ModeratedJan 22, 2012 5:28 PM (in response to Nick_Mattocks)Re: Problem connecting HD500 to an amplifier
Yep, you're right. Unplugging the laptop kills the noise, so it's still a ground problem.
Thanks guys for helping out with this! It's a relief to have finally figured it out.