Page 38 was when I went to make a coffee. Though I picked up where I left off, obviously I didn't. I've now put it in.
That resistor isn't touching, close, but there is a gap. Was just the camera angle.
I've rechecked my voltages and they are all good now.
I tested it with a cheap AKG K92 as I had it lying around, I know it is a low impedance headphone, but I'm not testing it with my HD6XX. Sounded lifeless, but I assume that was to be expected.
When I disconnected the AKG, the Crack was still on, there was a very loud click. So loud I thought I'd damaged them, but they worked again when I plugged them back in. Should I expect to get this when plugging in headphones?
I've tried it (with a bit of trepidation) with HD6XX by switching it off first, plugging them in and then switching them on. Wow! Massive difference between them and the AKG's, so much more life to the music. Just sat through Holst's Planets suite, sounded fantastic.