hi all really enjoy the fourm this is my first post so please be paitent, well anyways i have a Magnum 257 hp in my pickup paired with a TNT 350 hd amp and a roof mounted Wilson 5000 roof mount antenna it works great with flat swr but as soon as i turn my amp on it jumps up over two the only way i have been able to get it down to a good level is install a TVI low pass filter between the Radio and the amp does this sound right does this mean the radio is splattering also i have the radio turned down to a 1.5 watt dead key