I have a suggestion, buy an Accuphase 😁 just kidding.
I had a McIntosh MA12000 integrated amplifier and it took forever to break-in. It started out sounding harsh, edgey and muddy, thete was no telling what was going on. But when it broke-in it was fantastic! I also remembered repositioning my spkrs several times to get the sound right. Cables make a huge difference. EQ on McIntosh is fantastic so experiment.

