I want to use a D25AG tweeter from vifa's classic line. Aluminum dome. I would like to use the dual chambered design as the lower resonance is really nice. However, this design does not come in a shielded version. If I was to get a bucking magnet from partsexpress how much of the magnetic field does it remove? Basically, how close can I put it to my TV? Secondly, Does the dual chamber design not allow for bucking magnents to be used. I am not sure where the magnet is in these designs.