Rolls RA163 8-Channel Distribution Amplifier<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Mono or Stereo Operation - mono input to eight outputs， or stereo inputs to four stereo outputs </span></li><li><span class="a-list-item"> +20 dB Gain switch </span></li><li><span class="a-list-item"> All XLR jack inputs and outputs </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31-JcdDW1oL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31ZX-nd3XCL.jpg" noproxy>