Amp circuit production circuit diagram

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

Single chip microcomputer STM32L151CCU6

RF cable can be customized for other specifications

Murata muRATA winding inductance original authentic assured purchase

1. Is this amplifier suitable for driving low impedance headphones? My headphones have an impedance of 60 ohms. I'm wondering if it will work well with them.

2. What kind of sound quality does this circuit produce? Are there any specific characteristics like clarity, bass, or treble that stand out?

3. On the circuit diagram, the headphone input and output are shown as two channels, 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 or a Y-adapter? I’ve seen some physical and electrical diagrams of similar circuits, but this part isn't clearly explained. I’m a bit confused about how to connect everything properly.

4. How is the ground connection implemented in the circuit diagram? In real life, where should the ground be connected? It seems like the power is coming from the audio source, but I'm not sure if that's correct. I'm still a bit unclear on this, and I hope someone can clarify it for me.

5. Do I need to add a DC blocking capacitor at the output of the amplifier? If so, should it be placed in series with the 47-ohm resistor at the output? I want to make sure I don’t damage my headphones by allowing DC current to pass through.

Overall, I’m trying to understand the setup better before proceeding with any soldering or assembly. Any advice or clarification would be greatly appreciated!