About The Circuit
A 2 transistor tone controller circuit is illustrated below. This simple circuit is made with the help of Baxndal tone control design. A 12 Volt DC power os required for the circuit. Also note that the connection for the input and output is given in respect to the ground. Two POT’s are used. Out of these POT R5 is to bring adjustments to the bass and POT R8 is to bring adjustments to the treble. Sufficient current gain and input impedance must be provided by the circuit. For this reason, the transistor Q1 is placed as an emitter follower. Voltage amplification of the signal is provided by the second transistor. Tone is controlled by the resistor and capacitor network connected between emitter of Q1 and base of Q2. Variation of the values of these resistors and capacitors change the audio response of the system. On the frequency ranges of 10KHz to 60Hz, a maximum attenuation and boost of 10decibel is obtained. All electrolytic capacitors should have a rating of atleast 12 Volts.