The results of four large-eddy simulations of heated and unheated subsonic jets are presented. The computations were performed using one million grid points on jets at operating conditions originally investigated by Tanna in the late 1970s [Tanna, H. K., "An Experimental Study of Jet Noise Part I: Turbulent Mixing Noise," J. Sound Vib., Vol. 50, No. 3, pp. 405-428, 1977]. Two acoustic Mach numbers are investigated (U j/a ∞ - 0.5 and 0.9) at cold (constant stagnation temperature) and heated conditions (T j/T ∞ = 1.8 and T j/T∞, = 2.7). Changes in the jet mean fields with temperature and Mach number are found to be in agreement with published data. The far-field overall sound pressure levels are shown to be consistent with experimental data and spectral comparisons indicate that the simulation sound fields are in agreement with measurements. The limited resolution of the computations is shown to impact the radiated sound by yielding effectively low-pass filtered versions of the experimental spectra.