The X350.5 is indeed a warm amplifier. It may be one of the best out there in terms of combining the speed, detial and dynamics of solif state and the open, fluid and warm sound of tubes. Is it as warm and rich as a tube? No. But does it posess tube qualities? yes.
The X1 is dead neutral and I would think the combo would be a great match.
The X1 is dead neutral and I would think the combo would be a great match.