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Tube rolling Audio Note DACs

I have an Audio Note 2.1x balanced DAC. One of the output tubes recently went bad (they were stock Philips) so i replaced them all with NOS in a bit of tube rolling fun. However, I could swear the new output tubes -- 7308/E188CC Siemens 1969 branded Westinghouse -- have a recessed midrange, but I can't be sure about this as these tubes also have better bass and high-end output than the stock tubes. They may just be better balanced.

Any other output tubes to try on the AN DAC?

Thanks.
budrew

Showing 2 responses by gliderguider

gliderguider's avatar
gliderguider
294 posts
 
I put a pair of new JJ/Tesla E88CC into my 3.1x Balanced, and they did a very nice job - better extension and even more of that wonderful midrange clarity. A pair of NOS Brimars didn't work out as well. I left the rectifier alone.
gliderguider's avatar
gliderguider
294 posts
 
I recently put a pair of NOS Siemens into the 3.1x Bal when one of the JJ's went down. The Siemens sound more musical than the JJ without losing any clarity. Interestingly, in my preamp the Siemens sounded thick in the bass and rolled off on top, and I much preferred a pair of Amperex. The Siemens sound much better in the DAC.
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