I would change the input tubes with mullards or others. They make a big difference to the stock tubes.
Or look into an ASL aq1001DT - it is a tube integrated that sounds like a tube and SS - which will brighten things up. At least it has solid highs for me.
Or look into an ASL aq1001DT - it is a tube integrated that sounds like a tube and SS - which will brighten things up. At least it has solid highs for me.