The two modular slots located under the channel VU meters are referred to as?

The two modular slots located under the channel VU meters are correctly referred to as the Upper and Lower 200 Slot. This terminology is essential in understanding the modular design of the API Legacy Plus console, particularly when it comes to integrating different types of processing modules designed for this specific architecture.

The designation of these slots as "200" indicates a particular series of modules that are compatible with the console's structure, allowing for a wide range of audio processing options, from EQ to dynamics. This level of flexibility is a key feature of the console, enabling sound engineers to customize their setup to suit various recording and mixing needs effectively.

Being familiar with this specific vocabulary aids in the functioning and operation of the console, whereas other designations, such as "300" or "500," refer to different types of modules or slot configurations that are not applicable in this context. Thus, understanding the correct naming convention of the slots is crucial for anyone working with the API Legacy Plus system.