A simple coincidence model of MSO responses is presented. The model is notable in that it contains no inhibition beyond the synchronization to the fine structure of the stimulus as seen in auditory nerve firing patterns. Output patterns for model cells are simulated and compared with patterns observed in available recordings from EE cells in the MSO. Patterns are compared in terms of discharge rate, vector strength, and period histograms. The patterns generated by the model are found to provide an adequate representation of the data, and it is concluded that a more complex model is not required at this tme to describe available data on MSO firing patterns.