this system be the next evolution of the ht900 and ht920 . both of which have design flaw . I speak with a panasonic service engineer about the ht900 and he verify a pop noice come from my sub be a know issue with the sub , but no recall be issue . after 3 month of discussion they replace with 920 . after own a little over a year I have issue with the sub on this system also . there local certified repair company tell I there be a issue with the design of the circuit board on this system . different problem from the 900 . they say they though Pansonic would replace but after numerous conversation they do not . they make good tv but low quality home theater in a Box and do not stand behind they product .