Tone and volume regulator circuit for stereo equipment

The procedure of high and low bass or lowering of this circuit and the volume adjustment are similar to the previous circuit. The volume adjustment part connects the reference potentials of pin 4 and pin 2, so the pitch of pin 3 and pin 6 are reduced to different degrees. If a network with the same frequency is connected between feet 3 and 6, you can get different output signals with different volume levels at the sleeve head. This signal can control the audio equipment of the left and right channels respectively.