Can a cheater plug ever damage an amp's pwr supply

You answered that question like an engineer or designer with great talent. Have you ever considered starting an electronics company?

Hey, I have an idea ! Since your comments were in the form of a reply, how about COUNTER POINT as a name?

I'm in an older building and have to float all my grounds as I've only got 2-prong outlets. Since I recently started using a high-end power strip I've been getting shocks that feel like pins & needles when I unhook positive RCA connections from my preamp and sometimes my DAC(volume is down and amp is turned off). Nothing fatal but is this potentially harmful to me or my equipment? Should I unplug everything when I change connections? Sorry to diverge from the main question but it seems related. Thanks.

Tim

Tim, sounds like you've got more voltage on the equipment chassis than you should have. This can be an easy situation to fall into with "two prongers". Try reading this thread and see if it helps at all. Sean
>

http://forum.audiogon.com/cgi-bin/fr.pl?htech&1014011751&read&keyw&zzac=polarity

Tim please follow Seans' advice you may have a potentially lethal situation there. I presently ground all of my stuff, but I wouldn't hesitate to lift grounds as required to eliminate hum that can't be cured in any other way. Just always be well aware of the 'potential' for personal harm, which in your case does definitely exist; BE CAREFUL! If you measure with a voltmeter between those 'tingling connections' you'll probably read something close to 100 volts. Try reversing some AC plugs while trying not to induce any hum. If that doesn't help then try an inexpensive isolation transformer like Francisco uses; do a search for membername = Psychicanimal; he has posted on the subject.

As title sez.