Just now, in my favorite coffee shop, and idea sprang loose from my brain. I was reading about headphone amplifiers of all kinds. Of course, I have a favorite in my own rack, BUT then an idea came about. I already know that the Rachel is an excellent choice for such service. The 'challenge' would be to try different arrangements of resistors for the best load to the amp, and the least fatal to the headphone. Sound quality is at the peak of it all somewhere. Now, here is the idea that I am going to float soon enough:
   Instead of finding the right combination of resistors, I will be using a Decware Audio "Gizmo" for the connections. I have kept these babies around for years, just to use in such instances. Great for experimentation, and in this case, I am hoping for a revelation.
 More to follow......

Last shot. I used silver plated binding posts that accept wire up to 16 gauge.

Ok, got her up and running. I hooked up the transformers' primary winding -Across- the amp output, giving the amp a load. Then I placed 50 ohm resistors in series with each channel. The headphones sound great, and I can even use the potentiometer to adjust for my brighter sounding Grado cans. This idea is a keeper.

I have built a load box with Mills resistors similar to the diagram above, with very good results.

Looks good to me, but maybe where the wire jumps across another wire, it appears to be a connection. Is that what you are referring to?

Those bastards....  just when you thought that you could trust someone. I got this diagram from the internet. Now I hafta put my headphones on backwards. But thanks for pointing it out.