Maybe it is a myth that Marantz sounds "warm" compared to Denon. How do you objectively test for warmth? I've auditioned and purchased home theater receivers three times in the last 15 years. Each time, I brought home a Denon, Yamaha and Marantz AVR and auditioned them in pure/source direct modes with my favorite CDs. Each time, the Marantz bested the Denon and Yamaha models in 2-channel music reproduction. I am not sure if the Marantz sounded better for music listening due to being "warmer". However, I kept the Marantz units because they did sound better, whatever the explanation was. With that said, my current AVR is an Onkyo RZ-50 because I have a dedicated theater now, freeing the AVR of 2-channel listening duties. For kicks, I once swapped out my Dirac enabled Onkyo for my older Marantz with Audyssey. I removed the Marantz from the theather in short order. For movies, it was no contest, the Marantz was not as engaging. I have even tested a much cheaper Denon for movie watching against my Marantz and found the cheaper Denon to be much more entertainig and engaging. However, music listening and movie watching are two entirely different use cases.