one of the speaker's magnets is actually an electromagnetic coil that reverses it magnetic poles whenever the electrical current through it reverses.
(one of the speaker's magnets; is actually; an electromagnetic coil that reverses it magnetic poles) (an electromagnetic coil; reverses; it) (the electrical current through it; reverses; )
one of the speaker's magnets an electromagnetic coil the electrical current through it
is actually reverses reverses
an electromagnetic coil that reverses it magnetic poles
it