Very long Interconnect cables are not good for sound even if you use very tight accurate impedance xlr cable.
Finding the right xlr cable depends on other factors like the input impedance of pre and also the output impedance of dac/phono (or the input impedance of power and also the ouput impedance of pre).
As david said I think MIT or Transparent cables with custom tuned filter for your length are ok.
Finding the right xlr cable depends on other factors like the input impedance of pre and also the output impedance of dac/phono (or the input impedance of power and also the ouput impedance of pre).
As david said I think MIT or Transparent cables with custom tuned filter for your length are ok.