din/double din/half din, control interface and preamp
im surprised theres no USB dac with a 4-5 volt preamp available.
what would be nice is to have a replacement for your car stereo
something you can put in place of it.
that has the following features
1 hardware volume control
2 small display for track and other basic info
3 hardware playlist controls such as play stop fwd rev pause mute etc just like normal car stereo
4 bass treble controls
5 inputs and outputs for 6 channels( front rear sub)
or internal DAC + preamp that splits the channels into front rear sub RCA outputs