Very interesting Frans but we 861 owners don't have that [stacked subs] option!

As you say with one DSW it is totally apparent it is coming from there. If you feel underneath without being too close to the cone you can sense that it suffers a very sharp transient causing a sudden sharp movement. I have submitted a report to Meridian twice and on the second time they acknowledged receipt of my report and it was sent to their Technical Department. We can only hope!

Bob

861v8, UHD722v2, 5200s, 5200HCSEup, M6s, 3200s, DSW, Sony 55A95L, Oppo 203, Sky Q Silver
Samsung QE43Q65B, Oppo 105 & Sky Q Mini