Rane MX6S

I used this in a rack to run parallel stereo effects for my guitar. If you've never tried this I highly recommend it. I never gigged this unit. I put it in a rack, played with it for about a month and changed my mind about rack units. But if you are into racks this is essential. Here's a description of how to use it like I did. Reading this on TGP is what got me interested. 

UA OX line level out with 4x12 greenback sim —> TC Mimiq ADT —> stereo outs to Lexicon Vortex —> stereo outs to Rane MX6s stereo inputs:
Rane MX6s CH 1 panned L Split to Boss SE-70 mono In
SE-70 L Out to Rane MX6s CH 3 Mix panned L
SE-70 R Out to Rane MX6s CH 4 Mix panned R
Rane MX6s CH 4 panned R Split to Korg DL8000r mono In
DL8000r L Out to Rane MX6s CH 5 Mix panned L
DL8000r R Out to Rane MX6s CH 6 Mix panned R
Rane MX6s Main Out L and R to stereo amp

Rane's description:
The MX6S is a versatile, one-rack space routing device that can be utilized as a 6-channel mixer or a splitter with up to 8 outputs. In Splitter Mode, a stereo input signal can be sent to up to 8 discreet outputs. In Mixer Mode, a stereo input signal can be mixed with up to 6 mono signals - and at the same time, have separate direct outs for the mono inputs. This audio tool is very useful for distributed audio in Splitter mode, or in creating custom mixes in Mixer mode.

Used as a 6-channel mixer or 8-output splitter
Perfect for sending a stereo program to separate zones or amplified speaker systems
Create custom mixes utilizing mixed and separate audio feeds
Balanced and unbalanced inputs and outputs (XLR and TRS)
Balance / Pan and level controls with 6-segment LED meters on each mono input channel
Main Link function allows routing the Main Input signal to the Main Output
Main input and output level controls with 6-segment LED meters for each