Compression drivers are usually dynamic; that is, with a magnet and interacting coil arrangement, and a small diaphragm as the main transducer. These are the motor parts, also known as the driver, of a compression horn tweeter or compression horn general-purpose speaker, such as those used for Public Address (PA) purposes. These drivers are usually coupled to the throat of an exponential horn. Such an arrangement enables this type of tweeter to have very high directional characteristics, which allows them to be especially effective in situations requiring a very wide sound field. In typical home and car stereo near-field applications, large horns can be a bit too narrowly directional to be practical. For this reason, compression horn systems are usually found only in special purpose speakers used in mid and wide field applications such as PA systems or the sound systems installed in large theaters. However, some specialized horns have small apertures and very shallow horns, and can be quite suitable for close spaces.

Type of electrical to acoustic transducer with a domed diaphragm particularly good at reproducing higher frequencies and usually attached to directional horns.

a specialized mid- or high-frequency speaker comprising a small diaphragm and voice coil coupled to a large magnet structure. The unit is mounted to a horn, which acoustically matches the impedance of the driver to the impedance of the air and shapes the signal. Compression drivers tend to be expensive due to the precision tolerances required in their manufacture, but they deliver many times more sound-pressure-per-watt of input power than traditional direct-radiating cone speakers.

Compressor Concertina

Compressor Condenser Microphone