Magnets will have what effect on the square dance sound

Basically no effect, the speaker inside the stereo itself comes with permanent magnets, because magnets are the main components of the horn, even if he added magnets will not have any impact on the sound itself, the sound of the stronger electromagnetic interference has an impact, note: only the circuit will have an impact on the speaker itself is no effect. Of course, the strength of this electromagnetic wave if sent from a distance, the energy is quite large.