placed around all four speaker wires 175 next to the speaker connector board 130 the stereo mini cable 170 is then used to connect the computer 39 s line output 173 to the line input of the present invention at the stereo mini jack 174 the power supply connector 160 provides power with respect to fig8 what is shown is a typical computer 39 s volume control the master or main volume control of the computer system and its input volume levels are controlled via the computer 39 s volume control applet 200 by adjusting the sliders and turning on or off the mute buttons the amplified audio levels are achieved the master or main volume control has system audio output level control with respect to fig9 what is shown is one particular version of a circuit diagram descriptive of the present invention the circuit diagram 220 shows the components their values and electrical connections it also shows the signal processing that occurs from the input to the output for left and right channels stereo and shows the power supply voltages used also shown are the three different sets of components for the two thru hole circuits and the one surface mount circuit it should be appreciated by those of skill in the art that.