API 8200A: 8 BALANCED LINE INPUTS + STEREO MIX BUS: The 8200A has the same features as the 8200 with the addition of a transformer a master 8200A with no lost channels or lost audio quality through the API expansion connector, (cable supplied with each 8200A). Sends, solos, and power also link. 19” rack mounting. 1U. External PSU included. The API 8200A system is perfect for adding API quality additional line input channels to any console, or for very cost effective analogue summing. For example 24 inputs needs, 1 x 8200A and 2 x 8200, for a 24 in 2 out system.