Nice work, Big Dave!
Thanks for the compliments, guys, very much appreciated.
The PSU is my design, nothing special just +/- 15Vdc via LM317/LM337 on a home etch board. The pcb after it is a JLH PSRR, which detects noise on the DC and then cancels it out, followed by a cap. multiplier. Used in the AK-SCHA, and also used here, it makes a huge difference. I was part of the team that made the professional boards, with me doing the layout. The main board is a modification of an australian version of the classic Class A amplifier. It's been modified by SandyK, and can now be used with headphones, but with further improvements to the SQ via a modification to the input LTP. Board home etched by me.
The nice chunky cable is Van Damme classic XKE instrument cable. Very flexible and nice to work with. The stepped attenuator is due to be replaced by LDR's (Lightspeed) when they arrive.