*Please note  -- This pre-owned item may show signs of use. Please see the photos for details. Amphion One18 studio monitors offer premium performance for your critical monitoring sessions. These high-end passive monitors employ a custom-designed 6.5" woofer, a fast-response titanium tweeter, a high-density Corian waveguide, and a sealed enclosure with a passive radiator to deliver the natural, transparent, un-hyped sound you need to make critical mixing decisions.