hmmm, makes me wonder. I am running a sony 2540 amp (temporarily). I have it bridged to 2 channels so it is putting out 50 watts by 2 channels. I have these two channels going into a JL Audio 8w3d4 sub. The recommended power for this sub is 50-125 into each channel. I do have another amp, a jbl gtq220, which when bridged to 2 channels puts out 100x2. Could my sony amp be bad? I doubt I am putting too much of a load on it.