I have a denon x3600h I bought when it came out. My next move was to upgrade speakers. Svs ultra towers and ultra center. I decided I wanted all the channels so I got outlaw5000 to save some money. I buy the pb16 ultra, I then buy the monolith thx16 sub. 2 weeks ago I broke down and bought monolith 5x amp. Question is..does the AVR produce enough voltage to run both amps which are powering 10 channels. I have noticed that the monolith has no trouble going above reference in stereo. That’s both subs running and the two towers. 0 being reference so at 4 on volume. Spl from 9 foot was around 115db max. With that being said the outlaw could not go that high on the volume and sounded harsh. Monolith sounds fine. I had to build this system slow. That’s why there is some mixing of brands.