Emerald has used a number of electronic options and I've been through most of them (with nylon string guitars). I think the constant change is due, in part, to the evolution of electronics. So far my favorite pickup is the active Barbera in my thin-bodied X7 nylon electric. It's really clean and reflects the tonal qualities of the guitar. It is also a pickup used by Kirt Sand in his marvelous $6,000 guitars.