I just had an inquiry from a friend who'd like a fake stereo setup. Basically I need to split a mono output to two identical outputs, with a "blend" pot that would pan the signal hard "left" and "right" and have both outputs at same level at half of the pot. Ideally without a volume drop across the entire pot sweep and no sound coloration.
I'd use a buffered signal splitter vero layout to avoid colour of the signal. Then take the outputs of the buffer to a dual gang pot to balance the mix (sending each output to individual left and right pots.