2. amps-preamps
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Another Cronus Magnum question

My Cronus Magnum integrated has the Tung Sol KT120 output tubes and a Mullard CV4003 tube for the preamp section. I am still using the stock 12au7 tubes and the 12at tubes. Changing the preamp tube made a big change for a more ripe midrange which is what I wanted. What advantages would there be to replace the other 4 tubes to something better?

If I do change the other 4 tubes, can anyone give me some recommendations? I don't want to spend a fortune, but I assume there are much better tubes than the JJ tubes in there now. Anyone?
stereo5

Showing 2 responses by stereo5

stereo5's avatar
stereo5 OP
6,555 posts
 
I thought I would revive this thread. I put a NOS Mullard CV4003 (12au7) tube in the center position for the preamp and 2 Mullard 12au7 reissue tubes for the drivers. For the splitters, I used 2 Svetlana 12ax7 tubes. The amp sounds more open now and it is far better than the stock JJ tubes.
stereo5's avatar
stereo5 OP
6,555 posts
 
I bought the amp used in late August. It was 6 months old when I received it. The amp replaced a Classe 175wpc power amp and a Modulus3A tube preamp. I like the Rogue integrated much better, especially now with the updated tubes. This integrated is in my secondary system which is in my home office. I listen to it 8 hours daily with absolutely no fatigue. I may change the speakers to something more efficient like ZU Audio or something similar.
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