If you try your speakers with a tube amp you may want to check out the Speltz zero autoformers. The zeros can double the impedence that your amp will see changing your 4 ohm nominal speakers to 8 ohm.
Tube amp for "difficult" speakers,,,
I have a pair of Consequence Dynaudio, mk 2. They work well with my s-state 2x600 watts amp and sounds great esp at large volume levels. But I want to switch to tubes, and even triode if possible. Is good tube amplification unrealistic with these 83 db sensitivity speakers? I am probably not the only one with somewhat "difficult" speakers so all advice is welcome.