1Pcs 120Mm*49Mm Rectangular Subwoofer Diaphragm Assistant With Frame Diy Audio Low-Frequency Radiator

For Harman Kardon Racetrack Diaphragm Bluetooth Speaker Diaphragm Bass Assist Diameter:121 * 48mm Speaker opening:107 * 46mm (with R corner reserved for the four corners). It comes with an iron bracket and can be fixed with screws without the need for glue The workmanship quality is very good with specially customized rubber edges iron plate weights in the middle long stroke design and amazing elasticity. It is a good choice for DIY Bluetooth speakers suitable for 3-4 inch speakers Attention it's not a horn Package:1pcs The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.