Check the listing for details. Pair of Crossover Filter PCBs for the Copperhead Desktop Full-Range Speaker Kit. Condition: New. Listed at 16.00 USD. Custom printed circuit boards designed for the Filter Network of the Copperhead desktop full-range speaker kit by Parts Express. Take the hassle and guesswork out of crossover assembly, these boards make the process neat, quick and straightforward. The boards measure 3.8" x 2.4" and feature large solder pads and copper traces for great electrical connectivity. Includes: 2x Filter PCBs for the Copperhead speaker design. 4x Terminal blocks which accept up to 12 gauge wire. 8x Snap in PCB standoffs. 8x Mounting screws (screw finish may vary). Requires: Filter components for the Copperhead speaker design. Compatible components designed to fit on this PCB: C1 - 12uF - Dayton Audio DMPC-12 L1 - 0.60mH - Dayton Audio 0.60mH 20 AWG Air Core L2 - 0.22mH - Dayton Audio 0.22mH 18 AWG Perfect Layer Inductor R1 - 16 Ohm - Dayton Audio DNR-16 Assembly: Glue components to the correct positions on the board (hot melt glue works great). Secure inductors with non metallic cable ties. Solder components leads to the pads on the bottom of the board. Attach wires for input terminals and driver and mount the crossover board.