I've had the same problem with my C25 Master Class. It seems sometimes the weather is a factor....sometimes I'll just "tweak" the bridge doctor. Chances are it's not the wire (that would most likely be the transducer your talking about) under the bridge. Mine seems a bit sensitive to a G note played in various places on the neck. I've dubbed it a harmonic rattle. If I lay my little finger on the bridge with the least amount of pressure it stops. When I was visiting Breedlove this past summer I did talk to one person about this. If I remember correctly...I was told he's the go to person for problems. I explained and he told me to check for anything loose inside the body. Wires,battery,or even a loose brace. Didn't find anything when I got home and checked it. My guess...........correct adjustment of the JLD bridge doctor. The device has very little contact in area with the guitar top. This seems to me,would make it very sensitive to some kind of "rattle" if not in contact with the top correctly. This would mean square and flat to the top and the proper amount of pressure. The more I think about it the more I can see the possibility of certain, lets say frequencies?, to vibrate the top and loose contact with the bridge dr. in a way that might just get some sort of strange noise from it. I've seen hi speed film of a guitar top vibrating and that thing really gets to moving. Anyhow...I'm rambling now and really taking a guess about this. Good luck with finding out the problem. If you get the answer please post it. Mr. Ingram....any input???
Greg F

BRRRRR...I've lived in Florida now for about 10 years. An Ohio transplant. Having 39 years of winter experience and having burnt hundreds of cords of wood to stay warm I would suggest a humidifier.Especially if you heat your place in this way. Even it it dosen't cure the rattle problem it might just avoid other problems down the line. I have a Planet Wave humidifier and I like it because it won't leak no mater what position the guitar is stored in. Really not much need to humidify a guitar in Florida but it does get a little dry here once in a while. After I posted the other day I got curious about one of my other guitars. I installed one of the bridge doctors in in my D28 Martin. I don't play this guitar much and when I got it out and played it I found really close to the same noise coming from it the same place. Hmmmm? Coincidence? Tweaked the little bugger a little bit and it was gone. This guitar isn't as sensitive as the breedlove and maybe that's why it was easier to correct. I will tell you that my Martin was brought back to life when I installed bridge doctor. A great tool. Wish I would have invented it!!! Stay warm and keep playing.

Greg F