The Future Sound Systems MTX9A is a 9x9 81-point pin matrix great for complex matrix mixing and routing of signals. The pin matrix patching paradigm was made famous by EMS and Maplin synthesizers, allowing for modular synthesizer-type connections without the use of patch cables. Those designs made all the connections behind the panel, but with the MTX9A, you must patch into the inputs and outputs. It offers multiplication of one input to many outputs and summation of several inputs into one or more outputs. The MTX9A includes ten 2mm banana test pins and a dry-erase marker for labeling your sources and destinations.