12AU7 vs 12BH7 vs 6CG7 - Page 3 - diyAudio
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Old 18th August 2006, 07:24 AM   #21
SY is offline SY  United States
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Anyone mention the 20dB increase in distortion of a 12AU7/ECC82 compared to a 6SN7?
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Old 18th August 2006, 07:41 AM   #22
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The reason they haven't must be because it's umentionable I saw some hint of needing to find the best operating point of the 12AU7. However, its non-linear behaviour wasn't clearly mentioned. When you consider that any job the 12AU7 can do can be done better by the 6FQ7 (or 12AT7, depending on the application), it's difficult to see why the 12AU7 still gets chosen by so many designers.
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Old 18th August 2006, 07:50 AM   #23
SY is offline SY  United States
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As Tevye would say.... "Tradition!"
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Old 18th August 2006, 09:15 AM   #24
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Quote:
Originally posted by ray_moth
The reason they haven't must be because it's umentionable
I didn't mention it because i thought it was taken for granted that common fact.


Quote:
I looks wrong to me to see 6CG7/6FQ7 lumped together, as though they were the same. I know both are supposed to have the same electronic characteristics as the 6SN7 but the 6CG7 is considered to be inferior. It's reputed to be variable in performance from one example to another, while the 6FQ7 is much more consistent.
Other than microphonics, I haven't noticed much difference. Or is this what you meant
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Old 19th August 2006, 02:51 AM   #25
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Quote:
Just wondering if anyone has compared these? Is there any clear winner? I am using a 12AU7 at the mo and have tried...
Also try ECC186 if operating condition allows.

James
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Old 21st August 2006, 06:56 AM   #26
kegger is offline kegger  United States
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Also some find the 6SN7 or the 6CG7 to be a tube that lacks emotion
and find the sound of a 12au7 more pleasing.

Not saying I do, I actually like the 12bh7 as somewhere in between
the 2 for it's clarity and nice tone. IMHO anyways!
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Old 21st August 2006, 09:59 AM   #27
SY is offline SY  United States
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Interesting, since I find all of my tubes lacking in emotion.
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Old 21st August 2006, 10:38 AM   #28
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I can usually bring mine to tears with roses and candy.
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Old 21st August 2006, 12:59 PM   #29
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Kegger,

As SY said, the 12AU7 will make a lot more distortion than a 6SN7 under similar conditions. The "emotion" you hear in the 12AU7 may be the rich sound of second harmonics. If you like it, then enjoy it. However, the "unemotional" sound of the 6SN7 is probably more neutral and real, at least to my ears.
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Old 21st August 2006, 01:28 PM   #30
AJT is offline AJT  Philippines
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comments such as warm, forward, laid back, bright, etc..never fails to amaze me, wish i had their ears...

when i listen to music there are only two things that can happen to me, either i enjoyed what i heared, or i did not...
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