I put in a blender acoustic preamp in my Epi hummingbird. First impression was not worth a damn. But after playing with it, I now have an awesome guitar. I used the original under saddle pickup, but the mic was way too hot even surrounded in foam. I installed an Olympus me52 noise cancelling mic. Wow! It is now awesome. It leads me to believe that GFS needs some better choices in mics as well as under saddle pickups.