I am trying to amplify my MP3 with the schematic pictured below. Can anyone tell me there are any errors? Except I've removed R3.
One major issue is that your speaker is connected directly from the output to ground.
Note that in the circuit, the capacitor connects between the output and the speaker (in series). You seem to have connected them in parallel.
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So connect the C1's lead to ground, make sure its positive lead is the in same row as R1 and connect it to pin 6?
Here is a quick revision...