I have the notoriously inefficient and hard to drive Revel Salon 2 speakers. After needing to move from my much larger room to a very moderately size room, I decided to downsize and go from separates to an integrated. My first amp was the Hegel H390, which drove the speakers well enough, but not up to their fullest potential. Then came the H590. There was a big-time difference between to H390 and the H590. The H590 drove my speakers with much more power, dynamics and authority. The H590 was an upgrade to the H390 in every parameter. If you can't have separates and need lots of power, the H590 is one of the absolute best alternatives to separates, in my view. The H590 is a very special and magnificent integrated, and it's also a much greater value compared to way more expensive integrated amps out there. For it's asking price, I think that the H590 is the best integrated amp on the market.