Specifications

14
Also, when a ribbon is operated at frequencies approaching the element’s
own resonant frequency (which is naturally quite low, due to its high
compliance), the ribbon element stretches and “bows” to a point where it is
no longer within the magnetic gap. To get around either of these problems
means to move the permanent magnet structure from the edges of the
element to one entire side of the element, and/or to bond the element to a
“host” diaphragm, such as a sheet of mylar, and to clamp that diaphragm
around its perimeter. In either case the driver is no longer a ribbon; it is, in
fact, a planar magnetic. To date, no one has succeeded in creating a full
range ribbon loudspeaker.