The JAZZ uses the concept of active balanced headphone ground in which each headphone connection wire carries an additional signal such that the sum of the potentials of the wires equals zero.
The position of its volume potentiometer is measured with the use of an AD-converter. The output of this converter is then used to set the proper volume level with a number of electronic switches. There are a total of 32 levels which allows for sufficient small step sizes and a very analog feeling.
Maximum output: 15V / 300 mA