Thanks DreamTheater! I have read an article about that. If I am not mistaken, to fix this it is needed to press 2 or 3 buttons on the remote control when the pop of death appears. I found this article while reading some Marantz 6004 reviews.
One good thing I heard about them was about the awesome quality playing songs. I don't know if the reviewer has an unbiased opinion but that was clearly stated on the review that the Denon and the Onkyo were no match in terms of sound quality while playing music, also the Marantz crossover cannot be modified for each speaker individually. Since I am not very experienced on HT matters I don't really understand what difference it would make, but from the posts here on Axiom forum that I read I figure it out it must be an important feature on a receiver. Sorry for my lack of knowledge!