Spring Reverb is a common feature of many classic amplifiers. This Stomp fulfills that critical function. Spring, along with Vibrolo, is recommended as a post amp complement within a 2 space Stomp PedalBoard.
MIX: Range: 0 to 100; Default: 12 The Spring Reverb effect is added to the direct signal using the MIX control. MIX sets the balance between Wet and Dry. A 0 setting gives a 100% Dry signal. 100 gives a 100% Wet signal. At 50, the Wet and Dry paths mixed are mixed evenly at -3dB.
TIME: 0.5 to 5 seconds; Default: 3.6 This is the decay time of the Spring reverb. It represents RT60, or the time it takes reverb to loose 60 dB of gain (and essentially dissappear).
PREDELAY: 20 to 200ms; Default: 20ms This is the delay between the start of the direct sound and the reverb sound.
Waves Guitar Tool Rack User Guide.