Loudness between usb and wifi music

I have jbl sound system with sub woofer have notice when I synced my phone wifi to play, the music sounds incredible. and way louder than usb stick or fm source any thoughts? thanks

 

Hi I have the same setup, Raise the volume on your phone.

 

Your trucks have wifi?

 

Sorry meant Bluetooth
What i mean is why Bluetooth music off my phone much louder and crisp. than usb. Or fm
Shouldn’t all the audio Be equal

 

In an ideal world. The different audio encoders have variations in all phones and stereos, so your audio won't all be exactly the same.