  We study a bottom-up holographic model of large-Nc Yang-Mills theory, in
which conformal invariance is broken through the introduction of a dilaton
potential on the gravity side. We use the model to calculate the spectral
densities of the shear and bulk channels at finite temperature. In the shear
channel, we compare our results to those derived in strongly coupled N=4 Super
Yang-Mills theory as well as in weakly coupled ordinary Yang-Mills. In the bulk
channel, where the conformal result is trivial, we make comparisons with both
perturbative and lattice QCD. In both channels, we pay particular attention
into the effects of conformal invariance breaking in the IHQCD model.
