Nobsound HiFi Selector Passive Pre-Amplifier 3-IN 2-OUT Audio Preamp Adjustable Volume<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Inputs: A， B， C three-way RCA inputs， front panel Sel button to cycle， with power cut memory function. After power off A gear through output. </span></li><li><span class="a-list-item"> Output: A: straight-through output. B: output can adjust the volume knob on the front panel volume， for access to the power amplifier without volume control. </span></li><li><span class="a-list-item"> The products solve your worries in multiple sources， multiple power amplifiers， amp and other connected devices， eliminating the need for complex wire pulling operation will not change the sound quality of your system， It just a connect bridge， easy to operate. </span></li><li><span class="a-list-item"> Please note: this package does not include a power cord. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/411Uhz5Zl0L.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41V8EpTP4yL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51aaf6B%2BssL.jpg" noproxy>