Do NOT connect this circuit to the speaker output jack on your amp. Serious damage can occur to both your amp and this circuit and can cause a fire hazard. This is a line level device. Use only with preamps, effects processors, and other line level equiptment.
Line level refers to the output level of most mixers, preamps, and effects processors.
MFB filters together in paralell where shown. MFB filters together in paralell where shown. Keep all leads as short as possible to prevent oscillations. All power supply connections are not shown in this drawing. In all MFB filters below, C represents C1 and C2.