Check the listing for details. Leviton ND 4600 4-Channel Audio Filtering Programmable Micro Plex Dual SCR. Condition: Used. Listed at 35.00 USD. We have 3 of these available plus other models. Send us a direct message if interested in the entire lot. See our other listings for more related items. Introducing the Leviton ND 4600 4-Channel Audio Filtering Programmable Micro Plex Dual SCR, a top-of-the-line audio filter perfect for any stage lighting setup. This high-quality device is designed to help you achieve the perfect sound quality for your performances. Crafted by Leviton, a trusted brand in the audio industry, this audio filter is the perfect addition to your stage lighting setup. With its 4-channel programming and dual SCR technology, you can be sure that you'll get the best possible sound quality for your performances. Whether you're a musician or a DJ, the Leviton ND 4600 is the perfect choice for your audio needs.