Check the listing for details. AV10 MLF Low Frequency Woofer for NS10M. Condition: Open box. Listed at 120.89 USD. Since the Yamaha NS10Ms have been discontinued, finding aftermarket components has become difficult. Avantone Pro has come forth with an affordable option, reverse engineering the original NS10M Woofer. Avantone's AV10MLF is a near exact match from the 20Hz crossover frequency. To allow for more quality control and consistency during the manufacturing process, the woofer has been tweaked from a lapped seam to a single continuous press formed cone from the same supplier as the original NS10Ms. Using global resources and materials that comply with RoHS requirements. Built to the same dimensions as the original NS10, no alterations to to the cabinet need to be made, making it an easy install.Features:Affordable optionReverse engineering the original NS10M WooferNear exact match from the 20Hz.