why wireless headset sound worse than wired?

In simple terms, wired headphones are "pass-through," while wireless headphones require "transcoding and compression," inevitably leading to information loss.

1. Different Transmission Methods: Compression vs. Pass-through

• Wired Headphones: Transmit the complete, uncompressed audio signal directly through physical lines, achieving lossless transmission.
• Wireless Headphones: Rely on Bluetooth transmission. Due to Bluetooth's limited bandwidth, the audio signal must first be compressed (sacrificing some details) before being transmitted to the headphones for decompression and playback. This lossy process directly results in a decrease in sound quality.

2. Different Locations of Core Components: Internal vs. External

• Wired Headphones: Rely on larger, more professional DAC (Digital-to-Analog Converter) and amplifier chips inside phones, computers, or players to process the signal.
• Wireless Headphones: These chips must be integrated into a very small space inside the headphones. Limited by size, power consumption, and cost, their performance is usually weaker, becoming another bottleneck for sound quality.

3. Different Transmission Environments: Stable vs. Interference

• Wired Connections: Physically stable, almost unaffected by external interference.
• Bluetooth wireless signals are transmitted through the air and are easily interfered with by other wireless devices (such as Wi-Fi), which may cause sound to stutter or disconnect, affecting the listening experience.

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