Who makes great active preamps ? Tube or solid state or hybrid.


It appears, it is not Pass, Rowland, even Lamm etc. Who then ? 
I heard about Ypsilon, though some say it is a little bright and forward sounding.
inna
I’ve been very happy with Simaudio.  Had a 350 P which I really liked and I am now just selling because I upgraded to the P5 Limited addition
Depends on the sound you are looking for.  Many mentioned above are very good preamps.  I prefer point-to-point wiring and custom parts that most of the above do not offer.  Then there is tube types such as 12AX7, 6DJ8, 6SN7 and direct heated triode designs.  Each do something completely different.  What price range are you thinking about?

Happy Listening. 
Below $1500 you can't do better than a tube pre-amp from Frank Van Alstine.   Still designing and building great stuff in Minnesota USA.