Can you run an electrical current (ac or dc) thru a permanet magnet with out its magnetic feild being negated?

Answer 1

An excellent question. Running electricity through a permanent magnet is not how speakers work. The electricity is run through a coil which produces an opposing magnetic field to the permanent magnet.
As far as your question, I would guess, and I stress "guess", that it would depend on the current and the magnetic field produced by the current. Obviously, a high enough current would heat the magnet and negate the permanent field permanently! Otherwise, I suspect the magnet (a good conducting metallic type) would merely skew the permanent field as the electric field interacted with it, with no permanent effect when the circuit is opened.
I would hate to have to compute the resulting magnetic fields at various currents, AC vs DC, and direction of flow.

Answer 2

The magnetic field will not be affected, however you will create a force on the conductor within the field, cause it to move in various directions depending on the direction of current flow. That is how speakers and some other devices work.