When I was buying FRFR's at GC the rental guy told me his Alto 15's broke down a lot but the 12's where rock solid. I have an Alto 10 for duo I'm in and it's flat like my Jbl prx12's but the Jbl's are more articulate. I also have EV ZLX 12's too. Good for program material but I hate them for guitar monitoring. They are very scooped sounding and the dsp isn't much help..