No, polished aluminum isn't chrome, and I don't think anyone would confuse the two. There were definitely a few variations in the finish of the PS1s.
These chromed ones are I'm sure just something John did when trying to figure out what he was going to do with his finished product early on.
I'd trust John Grado to know if the ones he's selling on ebay are 1 of a kind or not. And I can't imagine two of those godawful abberations would have been made.
I was just being an ass. I'm thankful for anyone who serves, on our side or the other in any given conflict. If you care about your way of life enough to fight for it, you have my respect.
I picked up a few THAT 1200 ICs that are good for summing balanced signals to single ended. I didn't end up doing what I'd planned with them, but I'd be glad to send them along if you can find someone to build the appropriate box for you
I'm not saying it's not as good, I'm saying he might lose the voltage swing increase he's looking for.
The TTVJ 307/a and the balanced output amp craig brought to canjam (not sure which it was) were both spectacular amps.
My understanding is both the BA and the TTVJ 307a aren't differential amps, they just use transformers at input and output. So you won't necessarily see the benefits you're looking for from either of them.