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Gain Tubes vs Output Tubes - Aesthetix Calypso

I currently own the Aesthetix Calypso and each channel takes one Gain tube and one Output tube. I believe the 12ax7 is the gain tube and the 6922/6dj8 is the output tube. As I understand it, the signal from the source is first boosted by the gain tube followed by the output tube.

I'm in the process of starting to tube roll and was curious which tube change would make a larger impact to the sound. In other words, does one tube (either gain or output) lay the 'foundation' or the sonic character and the other tube fine tune it? Because of a limited budget, I'd like to put my money where it's going to make the most significant change first. Any input would be appreciated.

calgarian
calgarian5355

Showing 1 response by jmcgrogan2

jmcgrogan2's avatar
jmcgrogan2
6,346 posts
 
As Jim White states in his reply to this review:

"As you wrote, the Calypso is a simple circuit. It basically consists of input switching, volume control, gain stage (12AX7), output stage (6922). Therefore, anything that happens in the 12AX7 goes directly to the power amp and will be heard.

Thank you again for your wonderful review, I enjoyed reading it."

Best regards,

Jim White
Aesthetix

It would seem that the 12AX7 has the most bearing on the sound. Make sure the 12AX7's you use a very quite, or as Mr. White says, you will hear them.

John
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