This product can be called microphone preamplifier, and also preamplifier for short.
 

Features:
● 10 inputs (5 MIC inputs, 3 AUX inputs, 2 EMC inputs) and 2 outputs
● MIC1 in front pannel with highest priority for convenient use
● Each AUX & Mic input with individual volume control
● 3 priority input levels: MIC 1 > EMC1&2 > other audio inputs
● 2 tones control for Bass & Treble