I recently purchased an ibanez sr405 bass, used. It makes an uneven hissing sound, kind of sounds like wind or surf, whenever plugged into any amp, I've tried my tko 80, headphone mini amp, my guitar amps, etc. Same with all of them. It's loud enough to be pretty annoying. Anybody had this problem, can point me in the right direction? Other than that I love this bass so far.