The TEX MIX concept is about building a mixer depending to your needs, number and type of channels. 

This is a 4 stereo channels expansion. Several of this modules can be added to get more stereo channels. 
Every channel features:

• Stereo input (L works as mono in)
• SEND A control (switchable PRE/POST, in PRE mode the signal is present regardless to the ON/OFF/CUE switch position and channel volume control)
• SEND B control (post-fader)
• PAN control (only affects the master bus)
• VOLUME control (affects the master, cue and POST sends)
• ON/OFF/CUE switch: ON- channel is routed to the master bus
  OFF- channel is muted
  CUE- channel is routed to the cue bus

https://www.tesseractmodular.com/eurorack-modules/tex-mix-4-stereo-channels

• 12hp
• 15 mA +12V
• 15 mA -12V
• ? mA 5V
• 20 mm deep