Ok first of all i just want to say that Thomann is very nice, i made an order and i called them to change the oder, the new order actually costed more and Thomann did it without even charging me the extra money. they where very helpful and they do whatever it takes to please their customers so thanks for that Thomann.
Now about the Tannoy, I know there's a thing about hissing sound that many people talk about and i think i know what is going on. Tannoy reavel speakers come with an aux input for Smartphones, laptops, tablet, and therefore the input is very high or very loud in order to play music from Smartphones that have a very low output so in my opinion this is the reason of the hissing that when very quiet can be heard from almost 1 meter away. after testing a little i realized that if you turn down the volume from the back of the speakers to about 40% the problem is gone and i can still get them to play as loud as their limit with my sound card without even pussing my sound card to its limit. so in my opinion there's not any problem at all as there is not hissing when you set their volume to about 40 % or even a bit more.
The sound is really nice and i don't understand why this speakers aren't very popular, i own Yamaha hs7 that all thay play is midrange that drill your ears and i would say Tannoy are 100 times better, i also owned some alessis and behringer and heard many speakers.
Tannoy reveal 802 sound perfect to my ears of course, the bass very satisfying the trebles are very clear and midrange clear but not harsh. this speakers can play very loud and they still sound sweet without any frequency been annoying or harsh.
for me they worth much more than other studio monitor that are much more expensive.
Thanks Thomann you are the best !