Mesa Boogie Midi::Matrix amp/effects switcher/looper. This has 10 total loops, 4 parallel loops listed as preamplifier/effects, 6 other loops in chain, the last being 1-out-2-returns, also has 'loop split' for 2 separate 3 loop chains. I'm sure there is quite a few combinations that can be achieved, though I have not tried many. There is also 10 amp/fx switches. I'm guessing if you were to call Mesa they could tell you more as they are really quite nice.

It does many things including switch channels on amps, it has 10 switches. And it can switch between 4 different preamps in a rack, this is what I used it for. It also has 6 effects loops in it that I never used. I have a new high end switching system and don't use this one (or the new one really anyway), since I'm not doing much live switching at this time (but plan to). This unit is cool because you can do all of the switching for everything via the front panel and not have to use a foot controller if you don't want. Mesa Boogie Abacus MIDI Controller compliments this well, but any midi foot controller will work.

You can switch up to 6 loops and 10 function switches that can switch any on/off device and footswitch via midi. The midi matrix does not come with a footcontroller but will work with any midi controller. I do not have the owners manual for this, btw, but it should be downloadable via mesaboogie.com some where.