Some engineers like using multiple microphones when they track acoustic guitar. Blending microphones with different sonic personalities is an alternative to eq'ing - rather than tweaking frequencies, you simply choose from the different sounds available to you through the mics you've chosen. You can blend the tracks as you record, or record the mics to separate tracks and decide how you'd like to blend them at mixdown. There are many ways to combine microphones. One simple way to go is to position an R-122 at the 12th fret (shown above), then add a small or large diaphragm condenser mic off the body of the guitar, aimed at slightly behind the bridge. Another suggestion is to record a track of ribbon mic and a track of direct signal from the guitar pickup (if your guitar has one). You'll get the warmth and natural response of the ribbon, with the more immediate feel of the pickup blended to taste. Here are a few other methods to try. Space a pair of R-122's wide apart, one mic near the top of the neck and one near the end of the body, then add a large diaphragm condenser mic (Mojave Audio MA-200 shown) around where the neck of the guitar meets the body. Blend to taste.   Now try the same setup, but with a small diaphragm condenser (Mojave Audio MA-100 shown)  Try the SF-24 overhead setup with a large diaphragm condenser positioned in front of the guitar.