I use this pickup in a 30 year old Epiphone 12-string for smallish live gigs, some outdoors. If you are reading this, you have probably already read many reviews on the web, most of which say that this is one of the most natural sounding pickups for an acoustic guitar (6 or 12str). I totally agree, and this is a good alternative to using a mic on stage, which is not always ideal. The output is surprisingly strong. For comparison, it needs much less gain than my passive DiMarzio magnetic sound-hole pickup. I have not had the feedback issues that some users report. If you are reasonably comfortable with manual work, you can instal this pickup yourself. Take your time, and measure the space under the saddle carefully. This model is larger than the 6-string version, so in some guitars it's a tight fit. There are many good videos on Youtube to show you how. Enjoy!