1. Is this circuit suitable for driving low impedance headphones? My headphones have an impedance of 60 ohms.
2. What are the sound characteristics of this amplifier? Does it provide a warm, clear, or balanced sound?
3. The circuit diagram shows two channels for the headphone output, but my MP3 player and headphones only have a single plug. How can I split the stereo signal into two channels? Do I need to buy an audio splitter? I've seen some physical and electrical diagrams of similar circuits, but this part is still unclear.
4. How is the ground connected in the circuit? In the diagram, it seems like the power comes from the audio source, but I'm not sure if that's correct. I'm a bit confused about how the grounding is actually implemented in the real circuit.
5. Should I add a DC blocking capacitor at the output? If so, should it be placed in series with the 47-ohm resistor at the output?
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