I was playing around with my new 8 Plus, playing some music to test out the louder speakers, when I noticed that, when music is playing, and you touch the screen, you can feel it vibrating (along with the music), it is very noticeable and more noticeable the louder the volume is. I tested further by changing Equalizer settings (I always keep it on Rock), and that has no effect on it. It is easier to tell by starting music, turning the screen off, and putting your thumb on the screen. Did the 7/7+ do this? I'm coming from an SE so I'm not sure if this is common with the bigger sized phones with dual speakers, or if this is some kind of defect?