Ive got the Baltic 4 and using coax connection but now looking for different streamers (currently aavik s180) to be able to use the usb to se if that will tighten and speed things up a bit. I will try Lumin U2 and auralic Aries g2.1 soon. A don’t really like auralic as a brand but they might be punchier then lumin?
For tubes, my favourites this far have been melz 1578 with holes, old philips ecc40 with adapter and with different rectifyers such as, Benedix, brimare, usaf 596 with woo adapter, Gec u52, and a valvo g1064 (my favourite this far)
But now, I actually bought an entire tube kit with good adapters from a friend, the ones on the picture, haven’t gotten them yet to try but I think that they will take the Baltic as far as it goes.
I think the rectifyer is the most critical tube for prat and base respons, maybe I should try newer rectifyers, haven’t done that, Like the emission labs, Sophia, acme, Elrog?