I have read a bunch on ground loop problems, but I still don't understand whats happening in my case specifically.
here are the facts.
jbl sub160
does not hum when plugged into the wall on its on and powered on
when powered on but connected to the receiver, using LFE it hums
when plugged in to an outlet and with an lfe cable plugged into the sub, but not connected to the receiver or anything else, it still hums??
do I actually have a ground loop problem? or is there something wrong with the sub?
from what I've read I need the audio cord connected and the power cord connected to get a ground loop problem, but maybe I'm misunderstanding.
I just find it weird that there is no hum if its just plugged in and powered on, but that if you plug a cable into the LFE but don't even connect it to anything it still hums. It does seem like the huming is a touch quieter when the lfe is plugged into nothing than when it is connected to my receiver
any tips or suggestions would be greatly appreciated. I have had no issues like this with anything in my set up including my existing sub, I'm trying to upgrade to the jbl but it gives me nothing but issues in my set up.
thanks in advance
here are the facts.
jbl sub160
does not hum when plugged into the wall on its on and powered on
when powered on but connected to the receiver, using LFE it hums
when plugged in to an outlet and with an lfe cable plugged into the sub, but not connected to the receiver or anything else, it still hums??
do I actually have a ground loop problem? or is there something wrong with the sub?
from what I've read I need the audio cord connected and the power cord connected to get a ground loop problem, but maybe I'm misunderstanding.
I just find it weird that there is no hum if its just plugged in and powered on, but that if you plug a cable into the LFE but don't even connect it to anything it still hums. It does seem like the huming is a touch quieter when the lfe is plugged into nothing than when it is connected to my receiver
any tips or suggestions would be greatly appreciated. I have had no issues like this with anything in my set up including my existing sub, I'm trying to upgrade to the jbl but it gives me nothing but issues in my set up.
thanks in advance