HL Falbaum wrote:

Anyone have a source for MuMetal for shielding a Compass?

You don't want to shield your compass.

You can shield a speaker magnet if it is npt to close to the compass.

Having any ferromagnetic stuff near a compass is not a good idea.
Avoid magnetic fields (by proper routing of electric wires and discarding
magnets as in gps-antennae etc).

George