Ummm, yes //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif...
Though most ones now-a-days sold as car audio LOC's and in retail stores are transformer type LOC's... they take into account DC bias and usually have adjustable pots and shield grounds.
In the simplest form though, all it is doing is taking a high voltage signal and stepping it down...
nG