Vas (Thiele/Small Parameter)

Vas stands for "equivalent compliance volume" or "effective volume of compliance". Vas represents the volume of air that has the same compliance (springiness) as a driver's suspension system. In other words, it measures the air volume that would produce the same acoustic compliance as the driver's mechanical suspension. Vas is typically expressed in liters (L) or cubic feet (ft³) and is an important parameter when designing loudspeaker...