A friend of mine loaned me an SVS jam subwoofer to try in my system. I am currently using a Yamaha RXV-2095 receiver with NHT Super Ones across the three front channels, NHT Super Zeroes on the front effects and surround channels and a passive Radio Shack 12" subwoofer powered by an Hafler DH-220 amplifier. I have tried connecting the SVS sub directly to my sub woofer output port and with a splitter to use in tandem with the radio shack sub. When the SVS sub is connected I get a low level hum and a buzzing sound that can be heard through the three front channel speakers. Does anyone know how I can get rid of the hum and buzzing sounds?