As Spider V Firmware 1.05 Release Notes promises: "New Global setting: "Phones Mode" switches the headphone output between normal operation (Phone) and stereo line out (Line) for connecting to a mixer or audio interface without muting the speakers. In Line out mode, the headphone output is not affected by the position of the master volume, nor the presence of a cable inserted into the Phones jack. This is primarily for use on a Spider V that does not include XLR outputs."I upgraded firmware on my Spider V 60, but this does not work for me, mode "line" mutes speakers.