i have had problems with turn on - off pops with a couple of amps i had htried in the past but not my adcom or pg 275, so i believe its amp related,my friend 8443-did have alt noise he could not get rid of and thought it was deck related, i have not had any noise problems similar to his , i pay special attn. to grounding of all comp. some thing he didnt do much of on his veh.race good piont on decks the sq between other high end decks wont make or break the system, imo the 8053 is best sounding deck ive listened to. features will have more of an imact though.