Mixing with headphones can be challenging due to the distinct separation between the ears. This limitation can cause the perception of sound to be localized within the head rather than originating from an external source, as is the case with room speakers. Crossfeed addresses this by introducing some interaction between the left and right audio channels, simulating a typical studio monitor setup. Crossfeed enhances the headphone audio experience by mitigating the limitations of direct ear-to-ear sound delivery. Various headphone amps implement crossfeed differently, allowing users to customize the degree of interaction.