To connect an equalizer to the Fisher CA-871 stereo amplifier, first, locate the tape monitor loop or the auxiliary inputs on the back of the amplifier. Connect the output of the equalizer to the tape monitor or auxiliary inputs using RCA cables, and then connect the output of the amplifier to the equalizer's input. Make sure to set the tape monitor switch to the "on" position to route the audio through the equalizer. Adjust the equalizer settings as desired for optimal sound.