The Sherwood R-965 is the receiver version of the P-965 processor. The 990 is based on the P-965 platform, although they added the balanced pre-amp outputs, the DVI switching, and they re-wrote much of the software to incorporate things like the quadruple crossover and a cleaner user interface.

The 1070/970 is a platform developed from the ground up by Outlaw and Eastech (the company that builds them for Outlaw).