SAPP spectroscopic parameters T_eff and log g of the benchmark stars that have interferometric T_eff reference values above 5500 K (this includes two KIC stars 16 Cyg A and B). The vertical axis represents the residuals between T_eff, log g, and their corresponding reference values. The horizontal axis represents the reference parameters. The red line is a linear regression of the data points. Top panel: results produced by the SAPP constrained spectroscopy module, and bottom panel: results produced by the SAPP constrained spectroscopy module with a ν_max prior applied. The grey shaded region is our tolerance of 1% for T_eff and 0.05 dex for log g. The average uncertainty in each panel is located at the bottom right. For each star, several spectra were analysed (see Sect. 2).