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Amp with Tone Controls and Soft Switching

Amp with Tone Controls and Soft Switching

The circuit was constructed with the use of power audio amplifier LM380 in conjunction with the circuit that makes use of electronic soft switching and tone control.The circuit was constructed with the use of power audio amplifier LM380 in conjunction with the circuit that makes use of electronic soft switching and tone control.
The tone control configuration circuit uses a very popular and most common form of active bass and treble Baxandall tone control circuit, which has a unity gain at midband and uses standard linear potentiometers. This provides the supply for the amplifier while the first BC109C transistor serves as a buffer with high input impedance and the second BC109C amplifies the losses from the tone control. the bass control is focused at 100 Hz while the treble control is focused on 10 KHz. The reactive connections of capacitor and resistors attenuates high and low frequencies

The input of this is amplifier is via a tone control based on the baxendall design. The first BC109C serves as a buffer, offering a high input impedance. The output signal fed via a 10u capacitors reaches the tone control network. This passive network of resistors and capacitors attenuates high and low frequencies. The bass control is centered on 100Hz and treble control 10kHz. The second BC109C amplifies the losses from the tone control, overall the tone control provides roughly +6dB boost and -20dB cut.

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