Earthquaker Devices The Warden is an optical compressor with a feature set usually reserved for studio grade units. Built with high grade components and internally powered by 18v, The Earthquaker Devices Warden has loads of gain and sustain on tap. With complete control over attack, release, sustain and ratio, The Earthquaker Devices Warden will allow everything from a heavy squash with fast attack and release to “barely there” subtle compression. Optical compression has a reputation for having more character than a VCA or FET based compression and The Earthquaker Devices Warden is no exception. The Warden is true bypass and handmade with sweet loving care in Akron, Ohio.