I'm total neophyte when it comes to vintage audio. I was gifted a mcintosh ma6100 integrated amp, mr 74 mac tuner, and a pioneer pl 45d turntable. All mid 70s I believe. I also have a pair of Koss electrostatic esp9 headphones. The energized has no power cord but I believe it can be powered directly from the amp speaker connection. I read somewhere that if your amp isn't of a particular type of ground, you can do nasty thingst to it by connecting the Koss energized. Needless to say I'm a little leery to try it out. Any insight anyone can shed would be greatly appreciated
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