For some reason I noticed after upgrading a stereo by wiring the house with speakers certain music channels like Electronica break on that specific stereo, not solved by turning it off and on like when music sometimes abrubtly stops, I can only get the music to play again if I rebuy the stereo and don't upgrade it. Most of my other channels (including custom) work fine however. I've noticed using wallspeakers themselves are also affected too.