Nady CX-22SW One Space 2-Way Stereo， Plus Subwoofer Crossover<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Single rack space (1U)Shielded internal power supply with AC voltage select switch (~115V/60Hz or ~230V/50Hz) </span></li><li><span class="a-list-item"> Shielded internal power supply with AC voltage select switch (~115V/60Hz or ~230V/50Hz) </span></li><li><span class="a-list-item"> Phase inversion switches </span></li><li><span class="a-list-item"> Low-cut subsonic filters for low frequency driver protection </span></li><li><span class="a-list-item"> Servo-balanced XLR inputs </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31c-U1j99fL.jpg" noproxy>