Didn’t the 12au7 Apos tubes used to be available on Amazon? Don’t see them there.
Also looks like the price has gone up, now $207 for a pair.
I believe so. I bought at least one pair from there…
I have had the Apos Ray Select 12AU7 in my BHK pre for about 3 months now and they are a game changer. I was considering selling the BHK prior to adding the Apos Ray tubes. I was using the Psvane tubes that came with the BHK. Those tubes are fine, but the Apos Ray tubes added clarity, slam, and soundstage. I now nave no desire to part ways with the BHK. What a difference a couple of tubes can make.