Rays Tubes

Carpathian, it’s really not that hard to understand the differences among tubes, if you read some basic texts on the subject. Of course before substituting one type for another you need to understand how to read the data sheets.

The nerd in me finds vacuum tubes fascinating, one of the most modern world changing inventions.

I’ve never really thought about delving into the metaphorical nuts and bolts of them, but I think you just kick started me in that direction.

These are fantastic tubes. I use them in my BHK preamp (and in my recently sold Primaluna Dialogue Premiums run as monoblocks).

I have a large stash of NOS 12AU7s--Brimars, Teles, Radiotechnique, Cifte, Mullards and new production Gold Lions. 

The Apos RAY 12AU7s outperform them all, and come with a warranty and a trial period.

I have no affiliation or financial interest here.

These are the real deal and I'm about to begin selling off my very low hour NOS 12AU7 stash.

They are just that good...

andynotadam and dougthebiker, very interesting testimony. These are the same price as current Gold Lion 12au7, ‘Kevin’s stash’ (Upscale Audio’s highest grade). I am tempted to give them a try next time I buy. I had never heard of these before this thread. What is most significant to me is the possibility that current production may be gaining ground on equaling the quality of revered products of the past. Hopefully these quality gains become more common among manufacturers and lessens the impact of the increasing scarcity of true NOS. For me, perceived quality and price/scarcity issues have severely dampened my desire to acquire more tube gear.

I don’t have a lot of experience rolling tubes, but I recently replaced a pair of NOS 12au7’s (BugleBoys) with PSVane Horizon’s in my Backert Labs preamp. I am very pleased with the results.