I have a GK MB112-II. Essentially, it has an MB200 head directly wired to a 12" driver. While I absolutely love this combo, it would be nice to use the built-in MB200 to power other cabinets. My thought was to install a Neutrik NL4MD-V-S between the power amp and speaker. It's a switching jack, so I can wire it so that the connection of a Speakon cable will break the amp's connection with the 12" driver and route signal to an external cabinet. This is just a conceptual idea at this point. Can anyone find any flaws in this plan or have other suggestions?