I can not get my olympica nova 3 to sound as i want to

[n_brio]

I cant get my Olympica 3 to sound the way i like. My setup is:

Sonus faber Olympica 3 nova
Mcintosh C500T (Gold lion tubes)
Mcintosh Mc452
Rel S812
Laptop to Schiit yggdrasil (Tidal)

If i dont use the sub some music is fine but some miss a lot of bas. If i connect the rel the sound stage collapse, midrange disappear and sub take over.

I think i have tryed all now...
I have a few options:

1:Change speaker, What size of speaker do i need to have to not need sub (i know its a matter of taste) Do i need to go up to Amati Or bigger?

2: Change elektronics

3: Add one more sub.