A vibration isolator comprising: a piston (1605) resiliently disposed within a housing (1603) with a first set of seals (1607); a mount plate (1609) configured for attachment to a vibrating body, the piston being connected to the mount plate; an upper fluid chamber (1611) and a lower fluid chamber (1613), each being defined by the housing, the piston, and the first set of seals; a tuning port (1620) for fluid communication between the upper fluid chamber and the lower fluid chamber; a tuning fluid disposed within the upper fluid chamber, the lower fluid chamber, and the tuning port; and a piezo piston (1619) resiliently disposed with the housing, the piezo piston being configured to be driven by at least two piezoceramic actuators (1623).