increase usb volume in car

[charles905]

i have a yatour yt-mo6 and when using the usb for musice i have to increase the volume a lot compared to the radio, so when the yatour stops the volume is to high. eny help out there.

 

[darkbreeze]

https://thewirecutter.com/reviews/best-portable-headphone-amp-with-built-in-dac/