I recently purchased a Behringer Xenyx Q802USB, which I intend to use for inputing three Rode Wireless Go mics into my computer. I am using these adapters to use the "line in" inputs. But the Behringer has a horrible background hiss, which I can hear directly from the headphones and even if there is nothing plugged in. To make it more precise, here is a list of observations:
When nothing is plugged in and all the volumes are down except for the headphones, I can hear a very low background noise which I think is quite normal;
When I turn the main mix knob up, the hiss already appears and is already quite loud to my mind.
If I turn the level of channels 3/4 or 7/8 up, it becomes slightly louder but not much unless I put the level at the max. If I turn the level of channel 1 or 2 up (the inputs with the mics), it is significantly louder even at a reasonable level. Of course the noise adds up, so if I put several channels at a non-zero level (as I intend to do) it becomes more noticeable.
If I plug in the microphones, the hiss is very high compared to the input level. In general the volume is quite low and to have it at a reasonable level I must put some gain, which results into a high background noise.
From what I have read, some people say it is typical of Behringer, however I want to believe that this can be improved otherwise the mixer is just useless. It is also recommended to install the drivers (note that all the observations above are done on the mixer though), but for Mac there does not seem to be any and the sound is just as bad in the headphones and on the computer.
Any idea on what I can try?
