Guitar reverb type pedal emulating a true reverb chamber. Keeley have incorporated the RS106 filter which had points at 600Hz high pass filter and a 10K low pass filter. In the studio, music (or your guitar) was filtered through at these points before being sent to the speaker in the echo chamber. This made for a tighter, more defined sound to be present in the chamber. You can easily set the Decay to determine the length of the reverb. The Pre-Delay is used to match the classic sounds of vintage recordings, going from extremely fast doubling in the reverb to a slapback type of sound. The Brilliance Control allows you to have the same types of tools to filter and fine tune the reverb, which allows for soft reverbs, deep and sublime reflections, bright and reflective ambience–whatever you chose. You are now the studio engineer to your own sound!