- Experience crystal-clear audio with the 20 m30 m40 mcw low-pass filter, designed to eliminate unwanted frequencies and enhance sound quality. Perfect for radio and TV enthusiasts. - This low-pass filter features adjustable frequency ranges of 7 MHz, 10 MHz, and 14 MHz, allowing you to tailor your audio experience according to your needs. - Engineered for CW15W and PEP20W performance, this filter caters to amateur radio operators and audio lovers requiring high-power equipment. - Its compact size of 85 mm x 37.5 mm (without plugs) makes it easy to integrate into any audio setup, whether you are setting up for a radio competition or participating in one. - Use it to improve the clarity of your radio communications, boost your audio quality during live broadcasts, or enhance your home audio system for a superior listening experience. This low-pass filter combines functionality and convenience, making it an essential tool for anyone serious about audio quality and performance.