Audio Tone Control

Posted on May 27, 2012

Based on the classic Baxendall tone control circuit, this provides a maximum cut and boost of around 10dB at 10K and 50Hz. The first BC109C transistor (left hand side) is acting as a buffer. It provides the circuit with a high input impedance, around 250k has a voltage gain of slightly less than unity.

Audio Tone Control
Click here to download the full size of the above Circuit.

As the Baxendall tone control circuit is a passive design, all audio frequencies are attenuated. The position of the controls and reactance of the capacitors alters the audio response. The last transistor provides a slight boost of about 3x. The output is

Leave Comment

characters left:

New Circuits



Popular Circuits

1 Watt 2.3 ghz amplifier
Increased Feedback-Stabilized Amplifier
Vlf Whistler Receiver Circuit
Data Based IQ Demodulator
voltage What kind of Mic do I need to connect to a pots telephone line to speak
Alarm LED Light Circuit
SemiAutonomous Submersible robot for underwater research
super simple shortwave receiver circuit
Control circuit of automatic water
A sound and light control switch circuit