have had over 4 car's in my shop that had gotten there audio equipment installed at car tunes..
for instance
had a car come in. the headunit install was terrible!! sloppy. remote wire was hooked up to a speaker wire??? the capacitor was wired azz backwords.. loose grounds, bare wires, just a sloppy job. like a 5 year old was doing it......
this is one of many things i have seen come from car tunes.... allso not only from my experience with what i have seen. other installer's in the area have told me about installs they have seen come from there...