Hopefully a mixer that is compatible with the GLD-AR Racks!
I could imagine its a smaller mixer maybe with mountable Rack-Ears for 19″ Cases.
If you study the Name “QU”.. there could be a Q for quick/quality and the “U” for “personal (YOU).. like a Monitormixer….
i’m like a child on christmas morning.. can’t wait to see whats in the gift box!
Other speculations?
Maybe it’s “just” a DAW Controller… 
GL2400 32CH ==> GLD-80 / AR2412 / AR84
