These audio files accompany Recording The Harmonica in SOS May 2013.
In the first audio example (file 1) harmonica player Steve Lockwood demonstrates the range of sounds you can achieve with different mic setups.
In the following examples (audio files 2-4), Steve uses three different condenser mics: the Neumann TLM103 and AKG C214, both large-diaphragm, cardioid condenser mics, and the AKG C1000S, a small-diaphragm, cardioid, back-electret condenser. All three were positioned 6-8 inches away from the harmonica.
In the next two examples (audio files 5 and 6), Steve uses two different dynamic mics, the Shure SM58 and SM57. In each case, he demonstrates the difference in sound between playing 3-4 inches in front of the mic and cupping inside the hands directly in front of the harmonica. Notice the treble cut, bass boost and lowering of the mid-range peak when each mic is cupped.
In examples 7 and 8, Steve uses the Hohner Blues Blaster, a 'bullet' mic that has a crystal transducer with a characteristically honky, lo-fi sound. In the first example, the mic is plugged straight into the mixer. In the second, it's plugged into a Fender Blues Jr 1x12 valve guitar combo miked up using a Shure Beta 57A dynamic mic.
In the final example, Steve demonstrates the Harmonica Honker finger mic, a miniature electret condenser (similar to a lavalier mic) mounted to a ring worn on the finger. This mic's battery pack features a knob to add distortion and 'honk' to the sound.