Soundcraft mixers - onboard reverb

[FeatheredSerpent]

It's hard to say because they use a different selection/amount of algorithms for each of the units that license their tech, and then for each algorithm the different mixers will have differing amounts of parameters, and in turn those parameters will have varying options for tweaking.

So the FX16ii is based on algorithms taken from the MX100, my 328 uses algorithms from the pcm90 and the MPX-100, but I couldn't find any specific info on the Gigrac.

But if it sounds that similar then it most likely is modelled on that particular one you're hearing.