I ran across a small loose connection in one that had seen some use and abuse. My Spanish is pretty limited, but I did get Very Bueno , Very Good, I Like it $ the and big smiles all around. I know this guy and he is rough with his equipment he is famous for pulling on the cords rather hard, so it has to be pretty well made and it repaired with relative ease. Fun item and one for our Latino musicians from Mexico to Argentina and in between. The customer was happy, and that is what counts. Thanks Lace for a product for some of the main clients in my friend's shop as well as mine. These even work great in a Charango. Google that and you'll know what to do with the next armadillo you hit. The charango sounds beautiful, but lacks volume. These El Sensors are awesome! It brings the instrument into the mix. Some further processing and they sound divine.