I’m an older guy and grew up playing tubes and Solid State gear. I always had great results with these heads. Not too much tweaking...Most tone controls between 11 / 1 o’clock I have experienced some of the Class D gear on the market and as great as it is...it’s so different sounding from the older stuff. I always feel like there’s something missing. And I have to really mess with the tone controls to get me where I need to go. What modern non Class D heads are you all using these days ? Thanks.