Spring reverb effect, providing rich tones. The JHS Pedals "Spring Tank" reverb, offering simplicity and ease of use. The Spring Tank creates the perfect spring reverb effect with versatile controls: Depth, Length, Highs, Boost (which determines the overall volume), and two switchable, independent reverb mixes, Tank 1 and Tank 2. The Depth control sets the size of the space, and the Length control sets the reverb decay time. The Highs control allows you to adjust the high frequencies to control the tone of the reverb. The Tank 1 control functions as the main reverb mix, and the Tank 2 control functions as the second mix when the Tank 2 switch is ON, allowing you to instantly switch between two reverb mix options. The Boost control can also compensate for the volume drop caused by the reverb effect. Thank you for viewing.