@alightronics Still confused on your 300b tubes. What Quality category do the following tubes fall under and are they still current? Are they considered Art?
Cossor blue glass
Cossor dark glass
Mark II grey glass
Treasure z black glass
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@tksteingraber Sorry, I don't get your questions. Would you please make easier to understand ? |
@alightronics what hierarchy category are these tubes? Cossor blue glass Cossor dark glass Mark II grey glass Treasure z black glass The hierarchy of our product line is as follows: Also, are they current tubes or discontinued tubes? What tubes are ART I have not seen any labeled ART |
1. The two Cossor tubes you mentioned are customized tubes. Besides retail, Psvane also manufactures tubes for many audio and musical instrument brands worldwide. Due to the differences in performance and application environments required by each brand, these products cannot be directly compared with our retail products. Moreover, we have confidentiality obligations to our OEM customers, so I am sorry that I cannot provide an accurate answer to this question. 2. The Mark II you mentioned is part of the ART series and is currently still available for sale. 3. The Treasure z black glass you mentioned is part of the Treasure series, which is still available for sale. However, the Treasure series is a collaboration between us and distributors and is not part of our classification hierarchy. |
You should try the Psvane Art series 12au7s for your Octave preamp. As we both have the same pre, Octave Jubilee, I have experimented with many NOS, including the original JAN, Siemens, and RFTs that Octave specs with the Jubilee. I find the Art series in the Octave Jubilee to be great all around tubes. They do need some good hours for break in, approximately 20-30 hours or so. I use all the same specs for all 4 spots in the Octave Jubilee, including the selected position. While NOS may sound good, sourcing them and reliability issues are detractors to me when I want to listen to music without any disruptions due to tube failure.
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