Following are 20 best IC 741 based designs that could be implemented for any desired application as per the user preference. All the 20 circuits will equally

Tone control circuit using NE5532 or 4558 or LF353, as low noise with PCB layout. To adjust sound frequency, bass-mid-treble tone control.

This is a bass-tone circuit board for the amplifier. here in this circuit no need for any voltage. this circuit no need voltage.

This is an audio equalizer circuit diagram for the amplifier. it's without a pre-amplifier. if we want to we can add an extra pre-amplifier.

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