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ribbon loudspeaker

The principle of the ribbon loudspeaker is an electromagnetic one, comparable to that of the plunger coil loudspeaker. The movement is caused by the induction, which causes a magnetic field.

In the ribbon speaker, the current flows through the ribbon, which is in a permanent magnetic field. When current flows, the ribbon is deflected in one direction or another. Since the ribbon is also a membrane, the movement is converted into sound. Due to the low mass, ribbon loudspeakers can radiate high tones. This is why this loudspeaker principle is also used in tweeters. The frequency range of ribbon loudspeakers is above 1 kHz and extends far beyond the hearing limit.

Ribbon principle as used in microphones and loudspeakers

Ribbon principle as used in microphones and loudspeakers

The ribbon itself, which is made of aluminum, can have a specific shape, for example, it can be folded or round, it is in practice up to 10 cm long or even longer, can be over 1 cm wide and has a weight of much less than a tenth of a gram.

Ribbon loudspeaker, photo: Audaphon

Ribbon loudspeaker, photo: Audaphon

The efficiency of ribbon loudspeakers is relatively low, and it also has a low speaker impedance, since this is determined solely by the resistance of the ribbon. Therefore, the values are max. 1 Ohm. As a result, such speakers can only be operated with current drivers or impedance converters.

Informations:
Englisch: ribbon loudspeaker
Updated at: 27.11.2005
#Words: 220
Links: loudspeaker, coil, induction, magnetic field (H), indium (In)
Translations: DE
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