There is a long thread over at audiokarma that is dedicated to the JD9.
You might want to ask your question over there.
http://www.audiokarma.org/forums/index.php?threads/official-jolida-jd9-thread.344317/
You might want to ask your question over there.
http://www.audiokarma.org/forums/index.php?threads/official-jolida-jd9-thread.344317/