I did some search, and preamp if i understand is a set of one or multiples devices that do:
Apply gain,
level every inputs to desired output level consummer or commercial,
Mix multi entry together into one master mix
used as a switch for each input, (a bitlike a integratedamp)
Volume control aka pot
Loop , inserts inputs...
Pre amp for phono, phantom devices,
Pre amp for line instruments,
and more
So what i'm looking at is a sort of a Line Mixer but with integrated switch, and maybe possibility to use a control device like a external volume pot ?
