I have a headset that supports bluetooth and 3.5 jack. To my surprise the audio quality is better when using bluetooth and poor when using wire to the same source. I have also tried using USB-C cable but still bluetooth sounded better. By sound better I mean the audio is more louder and richer. How is it wireless blueooth offers superior quality than wired connection? Can this be expected?
Might be the amps. Some phones have crappy audio circuits.
this is the correct answer, your bluetooth probably has a better amp/dac circuit than your phone does. a dongle would be a better comparison point than straight to the phone.
Trying to make dongle comparison with headphones is solid point.
It’s probably the DSP. It can do it’s magic given a digital signal, while being bypassed (on most BT headphones, so you could still use them with a dead battery) with an analog signal.
But he says that even in USB them sounds worse than bluetooth. And USB still uses the DSP. So this might not be the case.
Is the Bluetooth connection using headphones dac/amp and wired is not?