After receiving my LFM-1 about five months ago, I first noticed a herringbone beat pattern on when watching over-the-air TV. This beat pattern shows up on VHF-Lo band stations received in my area. I traced the "noise" to the amplifier in the LFM-1. When it is in "standby", the beat pattern is more noticeable than when the subwoofer is running. Outlaw was contacted and a replacement amp. was sent. There was no change in the interference with the new amp., and I have just learned to live with the problem.....unplugging the unit when it isn't being used. (this is for an audio-only system...no home theater) The subwoofer is in a lower level rec. room, of a tri-level and the antenna(s) are in the attic. Has anybody else run into this type of problem??