Not to let facts get in the way, but I had to check the assertion that Marantz house sound is “rolled off”. In 2022, Stereophile did a review of the 40N, a $2500 integrated, and Atkinsons’s measurements showed it was about 0.2 db down at 20khz at 2 ohms! That is not rolled off! Now, I am not suggesting Marantz/D’Agostino/Wilson would sound good, but painting with such broad strokes about an entire brand seems gratuitous to me.
Btw, 25 years ago I bought an Audio Refinement Complete integrated amp to pair with some JMLabs floorstanders. It was a nice combo, in part because the Conplete had a “tube-like sound” that tamed the bright treble of the speakers. “Tube-like” was polite for rolled off; an old stereophile review actually showed the roll-off in the measurements. (It was down 2.5 db at 20hz.)

