Mixers

I’m restoring an old Soundcraft 600 mixer and discovered it doesn't use dedicated line amps and pads the mic amp signal.

I've been wondering whether my Soundcraft Signature MTK 12 was a defective unit, because it has the aux outputs polarity inverted with respect to the main output section. What is the purpose of such a design choice?

Is it possible to modify a console's channels so that the meters on the meterbridge show the signal level post-fader rather than just after the insert point?

Please can you explain the difference between 'soloing' a channel and using the other buttons marked 'PFL' and 'AFL' to listen...

Hugh Robjohns shrinks to microscopic size in order to show you around the conglomeration of knobs, wires and circuits that make up a mixer.