Bought two of these passive pickups, after reading many favourable reviews. I was a little apprehensive at first, that the signal might be a little weak, but these little gems really do an excellent job of reproducing faithfully, the sound and nuances of your favourite acoustic. The instructions clearly state that if one uses adhesive strips to secure the transducer discs to the bridge plate, about 30% of tone and signal strength are lost. Super glue gel is the alternative, and this means one only gets one shot at installing them correctly; but a jig and very clear instructions are included.
All in all a great product, giving accurate reproduction, without cutting into your beloved acoustic's side panel! Thanks again Thomann, for top drawer service, and very keen prices.