The API 8200A is similar to the API 8200, Except that it has built in summing amps for the stereo, solo and send outputs. Several 8200s and 7600s may be linked ot the 8200A, and it them becomes the master, using the unit's internal summing amplifers (there are, by design, no master controls as the user must connect this unit to an external control section).

These summing amps feature stereo API 2520 outputs with transformers for the stereo bus, nominal +4dBu, summing outputs for the sends and solo at -2dBu nominal level. This option is perfect when a rack of 8200s are used as additional inputs to a console and end up patched into a couple of faders or into the mix bus.

The API 8200A is not meant to be used with the 7800, unless the summing option is disabled.