Pro-Music-News Know-how

Vas - Equivalent Compliance Volume

Vas (Equivalent Compliance Volume) is a small-signal (Thiele/Small) parameter of a loudspeaker and means the volume of air which acted upon by a specified piston of area has the same compliance as the driver's suspension. It can be determined by measuring the input impedance of the driver (small signal close to the driver's resonant frequency).
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