This is just one of over 75 professional audio mixers covered in The Mixer Output Guide, which describes direct outs, inserts, hidden mods and more. To see the rest, and for definitions, visit The Guide.
Direct Out:
Stock with 24 outputs (16 XLR male, 8 TRS), expandable to 40 out (32 XLR, 8 TRS) (multi-use as direct outs, insert, aux, main, group, matrix), switchable pre/post fader
Insert:
Stock with 24 outputs (16 XLR male, 8 TRS), expandable to 40 out (32 XLR, 8 TRS). Stock with 56 in (48 XLR mic/line, 8 TRS line) (multi-use as direct outs, insert, aux, main, group, matrix), switchable pre/post fader
Gain Control of Direct Output: