Palmer PKYLL Passive 2-Channel Line Isolation BoxConsumer devices, as well as many professional keyboards such as synthesisers and digital pianos as well as some small mixers have unbalanced outputs. In order to connect them to a professional sound system and to avoid interfering noise over long cable runs, balanced signal routing is needed. For this purpose, the Palmer kyll handles the necessary signal balancing. Due to the galvanic isolation via a transformer, the kyll also eliminates ground