The Power Amplifier has two control inputs. The BTA input is used for LabPro, and the mini-audio input is used for LabQuest. The LabQuest input overrides the LabPro input, so that if the audio cable is left connected to the Power Amplifier, the LabPro input will be ignored.
Disconnect the audio input cable from the Power Amplifier to use the LabPro input.
Either of the inputs to the Power Amplifier can be used with SensorDAQ. You connect to the screw terminals of the SensorDAQ. Remember the is x2 if you come in to the BTA connector and x10, if you come into the audio input.