Hey guys,
This is my first post on the forum and unfortunately it's about a problem.
Yesterday I got my KPA (Powerhead) and since I plugged my guitar, on rigs with hot distortion, a hissing noise is being made (I'd say not very different than the sound you get in front of a loud cabinet) when the guitar is silent but with volume on.
The day before I had the same issue on a live show with a real amp so I figured it was the guitar's fault, but when I change guitars the problem persists.
Here's some things I've noticed through trials (all playing is done through headphones) :
- the amount of gain directly affects said noise, on clean rigs it doesn't occur
- when noise gate is turned on the noise goes away (at around 3,5 - 5 it dissapears completely)
- I tried another room where no electric devices are present and it's still there
- something that worried me, even with the guitar volume off or even without an input cable in, I can still hear the noise, it's at much lower volume but it's definitely there (still affected by gain amount/noise gate), is this normal?
- different guitar cable doesn't solve the issue neither different headphones
All that being said, in my experience, my house doens't have the best grounding. I would get having some noise, but even with no input?
Headphone volume is at -12dB. I will try the KPA on a real amp in the studio on Friday and will see if the different enviroment changes anything. The studio owner also has a KPA so it will be easy to see if my unit is defective.
But as you can imagine I was hoping for an answer before that.
I'm pretty frustrated by the whole thing and any input (no pun intended) would be greatly appreciated.
Thanks a lot!