The electrostatic loudspeaker deals with charged electrons attracting and repelling each other.
charges repel each other and opposite charges attract each other. This
principle is the foundation of the electrostatic concept. An
electrostatic transducer consists of three pieces: the stators, the
diaphragm and the spacers. The diaphragm is what actually moves to
excite the air and create music.
The stator's job is to remain stationary (hence the name stator) to provide a reference point for the moving diaphragm. The spacers provide the diaphragm with a fixed distance in which to move between the stators.
|QUAD (Quality Unit Amplified Domestic)|
|The Quad story
(from their web-site)
The history of Quad is one of audio excellence. The early products were all firsts of their particular type and cast
the mould for the products which would follow for many years afterwards.
|The ESL-988s are a direct replacement for the legendary ESL-63. And all the original features have
been retained. The rigidity has been improved and 95% of the components have been
The ESL-989 shares much of its technology with the ESL-988, but it