ART Zdirect Professional Passive Direct Box<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Fully passive， high performance transformer design. No battery required. </span></li><li><span class="a-list-item"> Converts 50k ohm inputs into 600 ohm balanced outputs </span></li><li><span class="a-list-item"> Switchable input attenuation (0， -20， -40 dB) Switchable low pass filter </span></li><li><span class="a-list-item"> Switchable phase invert </span></li><li><span class="a-list-item"> Switchable ground lift (fully isolates inputs from chassis and outputs) </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41ISummUvEL.jpg" noproxy>