The ui24 has 8 aux (monitor) outs plus main L/R. They all have individual feedback eliminators, Individual 30 band eq, Compression , gate.
There are 2 virtual aux chanels plus 4 virtual input channels- get your head round those..
Its also a great sounding DAW interface & can record 20 inputs to seperate tracks on a usb stick.
I could go on and on...