I'm with JohnnyR on that.
Matching impedance between amp/preamp is important. I'd look either to change preamp as well or look for the models that are OK with higher impedance preamps such as McCormack DNA... or Bryston models.
Matching impedance between amp/preamp is important. I'd look either to change preamp as well or look for the models that are OK with higher impedance preamps such as McCormack DNA... or Bryston models.