I asked Outlaw if they could tell me the differences between the 2220 and 2200, and here’s their reply:
”There is a physical switch for XLR or RCA input, which the 2200 does not have. The trigger output on the 2220 is powered. Whereas, with the 2200, it is not powered. It is simply an in/out connection. This is capable of powering up to 3 amplifiers before the available current from the source device reaches max capability. With the 2220, the trigger out has a separate powered trigger-out circuit. So, a max current availability will not be reached. Thus, more amps can be triggered.”