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Best 300B

Can anyone compare the new Genelex PX300B tube to either Svetlana 300B's, Western Electric 300B's, Sophia 300B mesh plates,newer KR300B tubes or Electro Harmonix 300B's.

From my experience the Svetlanas sound a lot like the Western Electric 300B reissues. New KR300b's are better than the older KR VV32B's, KR VV300B's or KR VV302B's and all the above are better than Electro Harmonix 300B's

My Sophia Mesh Plates sounded very good in my Manley Retros but after several listening sessions I put them back in their boxes because the bias kept changing at the recommended setting. Whenever I get around to it I'm going to compare them to others in one of my self biasing amps.

Thanks in advance,
Ron
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coltrane1's avatar
coltrane1
683 posts
 
Well here's yet another 'nother vote for the Shuguang Black Treasure 300B's.

These black powder marvels transformed a modest Grant Fidelity 3400 SET integ into a giant killer. The thing produces all of 8 watts Class A yet it drove a pair of Martin Logan Vista's, a challenging load, with ease.
coltrane1's avatar
coltrane1
683 posts
 
Shuguang Black Treasures, I 3rd that emotion. Hands down the sexiest tube I've ever laid eyes on as well!
jomoinc
62 posts
 
Still would like to hear from someone who has tried the newly availible Genelex PX300B...
abill
80 posts
 
I also have the Coincident Frank's 300b and I have tried around a dozen 300b's and my favorite is the KR 300b xls.
They are the test tube shape and they were made in the late 90's. The Frank's are amazing with these tubes ! I have a pair of Black Treasures, they sound good but they don't match the 300bxls frequency extremes, and the bass with the KR's is rock solid.
I am using Coincident Total Victory's IV speakers with a Supratek Cortese preamp and there is definately a synergy with these components.
charles1dad's avatar
charles1dad
10,235 posts
 
Abill,
The KR 300b tubes were always considered a good sounding tube, the problem was premature tube failure with poor company support. Perhaps your 1990s vintage tubes are of better quaility than current production. Where would one find these older tubes?
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