Reverb 4000 is a single-engine stereo version of Reverb 6000, featuring the best reverbs and presets from Reverb 6000 and M5000 as well as emulations of numerous immortal classics. Reverb 4000 is the first stereo Reverb capable of rendering credible space onto two discrete sources, or to truly process a composite stereo source. Quite simply, Reverb 4000 gives you the most immense and innovative selection of State-of-the-Art stereo Reverbs - at the touch of a button.