I had the Cary 300SEI for a while, in fact two incarnations of it. In the period of ownership, I puchased WE 300Bs, labelled 9738 so I think 1997 vintage. I also had the Sophia Princess, at almost 1000USD a pair with boxes. To my ears, neither were night and day better than the stock Cary tubes (Shuguang?). I sold the Sophias for 1/4 new price, still have the WEs if anyone is interested. I have moved on to other amps.
2019 300B tubes that are worth the money?
OK, I'm not a super rich audiophile that has unlimited money to blow. I have a pair of Cary 300 CAD300-SE monoblocks i bought used that currently have a pair of TJ/Full music tubes in them. I am, overall, very happy with the sound. So does anyone have a strong opinion that any of the $1000 a pair current production 300b tubes are really worth the money over my $300 pair? Would my money be better spend on a needle upgrade for my turntable? :-)