I use a K&K Trinity. It's the Pure Mini bridge plate sensors, plus a little gooseneck mic that sits right under the B string. Not like the Lyric mic at all, different animal. It could be passive, but sounds like crap that way, IMO. I didn't want much stuff in the guitar, though, so I use an outboard K&K mixer. I like that setup much better than the Pure Mini alone. The mic adds 'air', high end, something. Makes it sound pretty natural to my ear. That rig is in my Martin OM28V. When I got a D18GE, I didn't want to replicate all that. Instead, I got a cheap condenser mic, and run it to my Fishman Loudbox Mini. Since I got that, I haven't played the OM once. Over a year now. I know, I can just play the OM through the mic, too, and I will, but the D18 sounds SO DARN GOOD through that mic... the K&K is toast.