I want to understand the purpose of capacitors and variable resistor in the following audio amplifier circuit. Here is its datasheet.
C118 at amplifier output pin. C424 between amplifier input and output pins. VR3 between amplifier input and output pins.
Can we disconnect PIN3 of VR3 from PIN7 of Opamp? I cannot understand the purpose of this connection. PIN3 can be either left floating or maybe connected to ground to do volume control function through VR3. Please correct me if I am wrong here.
The power supply of the circuit is +/- 15 VDC.
If the circuit include 2 stages and the first stage is without the feedback resistor as in following diagram then is it ok?
In my second circuit diagram what is the meaning of 'Audio+' and 'Audio-' labels? Does it means that I can connect my mono headphones on these two points instead of using a 0 V (GND) reference for the headphones jack?