Disclosed are embodiments of a marine vibrator and methods of using. Embodiments of the marine vibrator may comprise a containment housing; a piston plate, wherein an internal volume of the marine vibrator is at least partially defined by the containment housing and the piston plate, the internal volume containing a first gas at a first gas pressure; a fixture coupled to the containment housing; a mechanical spring element coupled to the piston plate and the fixture; a driver coupled to the piston plate and the fixture, wherein the driver is configured to move the piston plate back and forth; and a compliance chamber in contact with the first gas, wherein the compliance chamber comprises a second gas at a second gas pressure.