Get cleaner more dynamic midrange and highs with new level of resolution from your AR3a with this upgrade. Upgrade consists of the following. Install all new parts including Hi-Fi Nedlab film capacitors. Low distortion “perfect lay” inductors Install new OFC pure copper wire. Can be made for either level control use or locked into the (0) flat position with resistors and bypass the Level controls. Fully tested on lab analyzer comes with frequency response test sheets. Matched pairs to +/-0.5db max deviation. Price is for a pair of crossovers. 20+ years of experience in hi fidelity crossover design. They started irritating me awhile back. So I got these new crossovers. They sound like a new speaker. Results are in a word SUPERB. What an amazing difference the crossovers make. The mids and highs actually sound transparent. Excellent, item as described great packing, improved sound detail, impressed! Take a look at my other interesting audio related auctions.