Unless you own some very expensive test equipment, easiest way to test SNR is to just plug in a super sensitive pair of IEMs and listen for hiss/hum. If nothing can be heard, you have a very, very good SNR.
If all you were doing is guessing if the tube is cryo or non-cryo, 6 to 8 trial isn't nearly enough. What if every trial was actually the same tube? How would you have done then?
If there were a UE10.5, Id go with that. I don't know which one I liked better. It's hard to know because the universals dont fit my ears with any of the tips and have to be held in place. I don't think I can know without trying custom fits of both
gpalmer has/had the original gilmore reference
this was a custom pre-amp version for emelius with 24-step gain switches. the contents of the 2 box reference are the same
No, I did a Mac OS X spotlight search for "gilmore reference black gates spain" and this is the only one. What kind of technical data? It is a balanced version of this amplifier HeadWize - Project: A Pure Class A Dynamic Headphone Amplifier by Kevin Gilmore with 1 of the power supplies for each channel. GoldPoint stepped attenuators and 2200uf FK? black gate capacitors, vampire silver wiring in the signal path
the bias board was only designed for 1 jack, so there is a 4.7M resistor soldered onto the board. Additional resistors can be added for each jack. I guess the previous owner decided to replace them with Caddocks