In-Ears headphones use magnetic dynamic drivers. If you bring the in-ears close to an electronic device that releases magnetism with a 29" CRT TV (coils, speaker) turned on, will this TV cause demagnetization or permanent loss of performance of these in-ear drivers?
I do not believe the field strength from a normal CRT or speaker coil is strong enough to cause a permanent change in the magnets of any reasonably made earphones.
Permanent magnets are generally magnetized to saturation, so a substantial amount of energy is required to generate a large enough magnetic field to create a non-reversing change in the permanent magnets magnetic field strength.
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Are the dual magnetic dynamic drivers of these in-ears very resistant to demagnetization and magnetic losses unlike 2.5" HDDs? To demagnetize or have magnetic losses of these dual magnetic drivers of these in-ear headphones, what power would be necessary? And what power does a 29" CRT have because it has coils and speakers?