such as Nathaniel Baldwin's vintage headphones.
the reluctance for the lines
for the magnetic field is very low. The magnet field has an iron path
of the way.
the "lever action" works on the
of the disk or diaphragm which also increases its efficiency.
more could you want???
sound powered designs. See
basically a improved "Balance
element with design improvements such as:
diaphragms (a more
mechanically attached so it did not have to be magnetic).
mass of the moving parts was
mass, more efficiency).
windings were improved.
elements (RCA's) the magnetic
are brought into play using laminated bars instead of solid iron.
and other improvements were
partly because of better machining of parts at the time.