Tube preamp will work fine with the CSX, as long as you run single ended.
The CSX has an input impedance of 50Kohm via RCA inputs, but only 1Kohm through XLR inputs.
A used VAC Standard LE preamp would probably make a nice match with the CSX, or Cary SLP-98 if you are looking for a bit more warmth.
The CSX has an input impedance of 50Kohm via RCA inputs, but only 1Kohm through XLR inputs.
A used VAC Standard LE preamp would probably make a nice match with the CSX, or Cary SLP-98 if you are looking for a bit more warmth.