SSIA on my MP-2 the left channel (channel 1) has a really loud analog hissing noise when the gain is turned up not even half way. I know it's not my mics because I tested it on both my AT853s as well as my Audix 1290s, I even reversed the inputs, and without fail the left channel hisses. It sounds like the noise floor is higher in the left channel or something. When I turn the gain up in the right channel it's very quiet.
So does anyone have any ideas of how/why this happens, and do I have to send it in to Sound Devices or is there anything I can try?