Denon Flat sounding & Lifeless compared to Yamaha

Hi audiogons, I've had the Denon X2300W for almost 4 years, and it always sounded flat & thin giving emphasis to treble, it never had the mid punch that I was looking for. The day when I replaced th Denon X2300W with the Yamaha RX-A1080, I realized what I was missing all these years. My Elac Debut 2.0 came to life, & it gave a good impact on the overall sound. I had a Chevy Cruze, which had a much well-balanced sound, unlike the Denon X2300W which sounded so thin even though I had the Elac B6.2 with the 6.5-inch driver.

Have you had any similar experience switching from Denon to Yamaha or Denon any other brand? Why is Denon so weak when it comes to musicality?