DetailsAttenuator Buy all your TV antenna accessories from Cable Magic. We stock TV antennas, Cables, Hardware and more. Attenuators are designed to reduce the signal strength of Free to air television. Sometimes when you live with direct line of sight or right under the TV broadcasting towers the signal strength is too high - resulting in the very same pixelation that you get when the signal strength is too low! Attenuators bring that too high signal back down to an acceptable level.