McIntosh MC302 Puzzling observation

[stereo_5]

I traded in my McIntosh MC152 and moved on to the McIntosh MC302 as I wanted more headroom. I have been using the MC302 since the middle of February and have slowly come to realize that the natural treble I enjoyed with the MC152, isn’t as good with the MC302. There is less sharpness to the treble. Since I did not change anything else, why would this be so? I was under the impression that the sound should be better with the much larger and expensive amp. The bass is better, deeper and better defined, but the treble sounds shelved down. Ideas anyone?