Wilson Yvette with D400

[sdn660]

for the 802D3, I tried them with the Krell amplifier but I found them very harsh but deep sounding.

B&W's 800D3 series have a very forward sound.  #37   To my ears the sound of Wilson's Yvette (and Sabrina) are more natural. But here are many satisfied owners of 800d3 series speakers on this forum. So it is really a matter of taste.

My question is, I liked the Yvette more but I am not sure how it will perform with D400 especially in the lows? Do I need to keep my subs?

You could buy Yvettes and try with and without subs and decide wether you want to keep the subs. Judged by the frequency responses of 802D3 and Yvette I would not expect a big difference in bass performance.

And the second question is, Can 802D3 outperforms the Yvette? is it a matter of amplifier?

I guess D400 is (more than) adequate to drive Yvettes. All I can say is Sabrinas perform very well with D220.