I recently got some of the above phones off Craigslist. Got a pretty good price as they have problems. The original ower died and his sister was selling off his stuff. Needless to say, any problems I will find could range from simple to fatal. Who knows. I will try to document the restoration...

Not sure if I read it or imagined I read it, but can it be done?   The Koss E/9 Energizer is not well respected.  I own it too, but I think the Stax energizer is more respected, so I'd like to try to mate them up if it won't hurt me or the phones.   Thoughts??