PAC BB-1PR Pair of Bass Blocker/Passive Crossover<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Easily handles power of up to 50 watts </span></li><li><span class="a-list-item"> Blue color coded leads for easy identification </span></li><li><span class="a-list-item"> Encased in heat shrink tubing with wire leads for easy installation </span></li><li><span class="a-list-item"> Pair of bass blockers </span></li><li><span class="a-list-item"> Used for removing bass from speakers to prevent damage </span></li><li><span class="a-list-item"> Frequencies blocked: 4 ohms: 0-300 Hz / 8 ohms: 0-150 Hz </span></li><li><span class="a-list-item"> Filters out unwanted frequencies sent to the speakers </span></li><li><span class="a-list-item"> Passive crossover designed for 6" x 9" speakers </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41m2SdUsn6L.jpg" noproxy>