Will there be a difference in sound quality between plug-in stereo and Bluetooth speakers?

If the plug-in speaker and Bluetooth speaker have the same hardware except the signal connection mode, the general application can't hear the difference. The advantage of plug-in type is that the connection mode is more reliable and the signal path is simpler, but the disadvantage is that it cannot be used when wireless is needed. The advantage of Bluetooth speaker is that it has no signal line, so it is more convenient and free to use. The disadvantage is that the signal is transmitted wirelessly after many conversions, and the fidelity is not as high as that of signal line connection.