Inthis paper, we propose to generalized proportional reversed hazards model by Tsx*,t=[Ts,(X, t)]a, where Tsx*,tis baseline distribution func- tion and a is a positive real number. The monotonicity of the baseline failure rates in relation to the monotonicity of the baseline hazard are studied in a general way. A set of sufficient conditions are provided for X* to be s_IFR [s-DFR] when X is s_IFR (s_DFR). We also prove similar preservation results for the s_NBU [s-NWU] aging properties. Finally, some generalized stochastic comparisons are given