The Echoes delay is the result of public demand for the Dark Side Keeley Fuzz Delay and modulation pedal being broken into two separate units. In short, you can now use the modulation and fuzz and delay separately at opposite ends of your pedal board. The Echoes pedal has up to 950ms of delay time and sounds nice and warm when placed in front of fuzz pedals or distortion. The concept for the delay is based on a tape delay machine with four heads for playing back the repeats. The end result is rhythmical patterns that are very musical.
The Rotten Apple Fuzz meanwhile gives users the dreamy combination of bass and gain that is sensitive to the guitar that you are using as well as your strumming pattern. The tone control allows for a varied sound to your overall mix with the option of a flattened sound. With a sound that is described as thick and dreamy, on full settings, the Rotten Apple gives you a drive and crunch that will easily cut through the mix of a full band.
For more information on the Echoes Delay or the Rotten Apple head to Robert Keeley Engineering.