Sorry, thats about the best I can do. The pic was copied from a review of the guitar (which I didn't think told me much). Anyway, my point is that in order to get some sort of "acoustic" sound they've got a lot more than just a piezo bridge. Here was one I did with my son. Its got two humbuckers in a normal 2V2T 3 way switch configuration and a Fishman ToM bridge with 6 little piezo crystals. The PCB only gathers the separate signals into one output. We ran the piezo output separate from the 'buckers since piezo's have such high impedance and want to have their own pre amp. The piezo bridge does have its own passive volume control (right side of picture). I only had a short opportunity to play this guitar but was very underwhelmed by the Fishman bridge. I didn't think it sounded good at all and certainly not "acoustic". My son must feel the same, last time I asked he said he never plays that guitar.