Set of four 99uF bass blockers for speakers

This set includes four bass blockers with a capacitance of 99 microfarads. They are designed to filter audio signals at specific frequencies, with one set tuned to 400Hz at 4 ohms and another to 200Hz at 8 ohms. The blockers are suitable for use with 5 1/4-inch, 6-inch, and 6 1/2-inch speakers. They help manage sound frequencies to improve audio clarity and protect speakers from unwanted low-frequency signals.