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In Reply to: To worry about which variety of 12AU7 is better, seems a bit pointless to me posted by Timbo in Oz on July 10, 2015 at 00:37:32:
I see you're quite definite re the 12AU7. I don't understand why so many amps are designed to use that tube, if they are so bad. Generally speaking the 12AT7 is easier to find in good shape and are less expensive than equivalent 12AU7s. I bought a little headphone amp, a Bravo 2 which uses `1 tube and it is a 12AU7. I found that rolling it had less of an impact on the sound than I usually find. I am not sure why this is but I suspect the SS element of the amp is it's output stage, which overwhelms the input stage signal. I like the amp, any way, but use my larger desktop with 6080s more than the Bravo. I haven't tried anything other than 12AU7s (ECC82s etc..) in it.
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Follow Ups
- RE: To worry about which variety of 12AU7 is better, seems a bit pointless to me - Mechans 05:25:34 07/10/15 (8)
- I found that rolling it had less of an impact on the sound than I usually find - Timbo in Oz 14:40:49 07/10/15 (4)
- RE: I found that rolling it had less of an impact on the sound than I usually find - Mechans 17:55:59 07/13/15 (3)
- The 6SN7 is a fine tube, the 6CG7 is the noval/9 pin smaller version - Timbo in Oz 20:28:27 07/13/15 (2)
- RE: The 6SN7 is a fine tube, the 6CG7 is the noval/9 pin smaller version - Mechans 12:21:32 07/25/15 (0)
- RE: The 6SN7 is a fine tube, the 6CG7 is the noval/9 pin smaller version - Mechans 14:54:40 07/14/15 (0)
- RE: To worry about which variety of 12AU7 is better, seems a bit pointless to me - Eli Duttman 11:33:50 07/10/15 (1)
- OK that makes sense.sort of? - Mechans 13:51:50 07/11/15 (0)
- RE: To worry about which variety of 12AU7 is better, seems a bit pointless to me - Caucasian Blackplate 10:00:47 07/10/15 (0)