The answer is as follows: The main difference between the first generation of Apple Bluetooth headphones and the wired sound quality is the transmission method and decoding technology. Bluetooth headphones use wireless transmission, the audio signal is transmitted to the headset through the Bluetooth connection, and the wired headset is transmitted to the audio signal through the wired connection.
In terms of decoding technology, Bluetooth headphones usually use SBC encoding, while wired headphones can support a variety of high-fidelity audio decoding technologies, such as AAC, LDAC, etc., so the sound quality of wired headphones is relatively higher.
In addition, because the Bluetooth headset needs to be compressed and decompressed, there may be a certain loss of sound quality during transmission, while the wired headset will not suffer this loss.
The wired sound quality is better than the first generation of Bluetooth headphones.
Apple wired headphones mainly transmit audio signals through wires, which is relatively more stable. The Apple generation wireless earphones are transmitted through Bluetooth and other ways, which are susceptible to interference from distance signals, so the sound quality of the two will still be different, and the sound quality of Apple wired earphones is better than that of wireless.