Mandotim, I also have two Behringer, V 12's with two 12" speakers in each one. I use them, as a matching pair, for my keyboards, running in true stereo chorus. I run them 'clean', and they are ok, for in the studio(practice amps), other than they have a bit more 'buzz' than I like, and are slightly underpowered..BUT..for the money, they do ok. Surprisingly, a Marshall head, running through a Fender cabinet, which I replaced the Fender speakers, with two Carvin High energy 12's, (they have huge magnets, and are virtually 'bullet proof')is unbelievable for both electric, and GREAT, with acoustic guitars! Clean, fat, and powerful. Right now, I'd recommend that set up. With electric guitars it has great bite, yet pulsing mids, and bass. Until recently, I also ran a bass cabinet, with 2 15's in it, WITH the Carvin 12's..for an incredible FAT sound..but I sold off, the 2,15 cabinet.
.....P.S...So, what does that have to do with mixers?