so after my car got stolen and my old head unit jacked along with subs and amp.i wanted new head unit and sub and amp. old system didnt have any problems. i have Pioneer TS-G1644R in my doors and Kenwood KFC-G1620 in the back. no amp. i use a pioneer deh-4400hd head unit. so after a while if mid volume 29-30 for sometimes between 5-25 mins. the deck stays on sub plays but the other speakers cut out. they dont fade no pops just suddenly cut out. they some times they come back after 5 mins sometimes its 20 mins or longer. ive checked all the connections at the speakers and back of the unit dont really understand whats going on and its really frustrating i drive 30 miles to work so it gets annoying!