Using a phono cartridge as a balanced source is something that was first done by Atma-Sphere, in 1989 with the MP-1 preamplifier, which also has a fully differential phono section.
You do *not* get more gain with the cable- you get less noise, and less artifact from the cable itself.
You do *not* get more gain with the cable- you get less noise, and less artifact from the cable itself.