Hi , im not familiar with the primaluna but I have a unison research Unico for 8 yrs now! One thing I can say its a very sweet sounding amp. My speakers are the Triangle Celius , very easy to drive speakers. Highs are very extended in my set up. Limited on the lower bass bec. It's only 80 watts , but lows still sound great! Not for Rock n Roll ! I replace the tube with a mullard 12au7 something. I like this amp very much. Hope that helps. Oh cable matching is important!
Regards
Unclechardy
Regards
Unclechardy