The 301dl Dynamic Echo provides the kind of features and versatility that will make it an essential part of your effects arsenal. Like a one second maximum delay. And both High Damp and Low Damp controls. Plus fully adjustable Lo-Fi (to emulate the sound of a tape or analog echo) and Hi-Fi controls. In addition, the 301dl features a very cool ducking function. When it's engaged, the echoes are muted. When you stop playing --whether for just a moment or for a long period of time-- the echoes are no longer muted and can be heard at their normal volume. And the 301dl's Pre Delay control lets you set different delay times for the first and following echoes.