I got a problem. I live in a very old house (built in late 1800's) that used to belong to my great grandmother. All the plugs are two prong. I got some of those 3 prong adaptors and thought every thing would be fine. I did'nt even screw the the mounting screws through the metal loop like the adaptors say right on them (I'm lazy). Everything was fine then my bass started shocking me. So then I put the mounting screws through the metal loops and everything was fine. No more shocks since. But now I got a problem with amp hiss and I notice it goes away when I touch a metal part of the bass like a string or knob. So it's definitely a grounding issue. So I got my multi-meter out (I'm an electronics student ) and tested the continuity to see if the mounting screws were actually acting like grounds. Nope. I ass-umed my power strips had chassis grounds and I would be fine but I guess not. Are there any power strips out there that will act as grounds even when plugged into a two prong outlet? Thanks for your help.