I do a lot of small restaurant gigs where space is a premium and I use my AER Compact 60 which handles the duties exceptionally. Occasionally, I also play with another vocalist and I wanted something compact and easy to use that I could add to give me a couple of extra channels. This is exactly what I was looking for!
What is essentially a two-channel preamp mixer offering the same features and controls as my Compact 60, I can run this into the FX return on the amp and it turns the Compact 60 into a four-channel amp. Perfect.
Additional features include a simple effects section which means I can have more (or less) effects on the vocals than on the guitar, 24v phantom power available to switch on to either channel independently, and an aux in with its own level control should I want to add some backing tracks or have music playing in-between sets.
It's very small size makes it incredibly portable and again, means that on those gigs where space is tight, it can sit unobtrusively, right on top of the amp and deliver everything I need. On larger gigs, I run a line out of the amp into a powered speaker and I've got everything I need for great sound in a very small, compact rig.
Sure, there are cheaper mixers out there that will do a similar job but the build and sound quality of this little gem is worth every single penny and then some.