Advise on getting the usb firmware to work on classe cp-800


I am trying to get a MK1 CP-800 to upgrade. Any help out there would be great.
lukas23
I knew about the streaming board, but not a board for the USB. I thought that some bug fixes were available by upgrading the firmware.
My main issue is that I am running a sub and the signal is almost non existent. Any thoughts?