Please take a minute to look at the audio amplifier diagram below:
In case it helps, the diagram comes from a do it yourself Velleman 7W Mono Aplifier (K4001) kit. The amplifier is based around the TDA2003 amplifier.
My question is: Are R1, R2, R3, C1 and C5 forming some sort of negative feedback network? If yes, how does this setup work?
The reason I ask is because so far, I have only seen negative feedback on op-amps and the setup always consists of two resistor that can be configured to provide negative feedback and adjust the op-amp gain. This particular audio amplifier looks like an op-amp to me but I don't see the usual two resistors... heck, I don't even see one of the input biased to half the voltage supply.
Whats going on here? Am I missing something obvious?