SSM with the "SSM EXPAND" Expander! 

WMD Sequential Switch Matrix is a four in four out patch matrix that allows you to modulate presets! It's also part of the Control Bus series and can sync it's preset switching with Metron and many of the other Control Bus Masters. From WMD:

"Four inputs can be routed with individual buttons to four outputs. Those routing settings are stored in an array of matrices that can be sequenced or controlled with CV. Preset routing, feedback loops, chop sequences, trigger blasts (with expander), four-bit-wavetable-synthesis, and dramatic controllable mayhem are all possible.

Expander

Note: This is a used module. It may exhibit minor signs of wear such as rack rash but is fully functional. This module will include M3 screws, ribbon cable, and a box, but not the original box.