The bass I play is the 5 string version of the Sound gear SRA300(pictured). It is active and has a huge signal. I am not sure if this has anything to do with my recent stroke of bad luck with amps. In the past month, I have played my bass through a SWR Working Pro 4x10, 2 Acoustic B200's, and an older Ampeg B-115 of sorts. Each of these amps exhibited varying degrees of sounding as if a speaker had been cracked (that fuzzy, crackly, farty sound). This would usually begin to occur when I plucked a low note at a louder dynamic. I usually have my bridge pickup on 10 and my neck between 7-9. Even at lower volumes, this has still occurred. I am not putting any unnecessary strain on the amp levels. I've only ever had them loud enough to sound balanced in whatever group I am playing with. I am not even slapping or anything, just plucking a low note at fortissimo - something an amp I think should be able to handle. This bass has had no problems with any proper amp until the past month or two. I played it through a little Hartke kick-back every night for 6 months on a cruise ship and it was fine. So, is this all a big coincidence? If not, what could be the problem? An electrical issue? A frequency thing? I'd appreciate any thoughts on the matter because after the fourth one, I'm seriously psyched out and apprehensive about this and afraid for every amp I come in contact with. I have a new Working Pro 4x10 on the way and I don't want it to have the same problem. Thanks so much for any ideas or suggestions.