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Your thoughts on these different tubes?..

I had tubes in the past from VAC, BAT, CJ and others...but have been in the world of solid state as of late.

Thinking about doing a modest system based on a tube integrated and would appreciate hearing your experience with the following tubes:

Output tubes: KT88 vs 6550C vs EL34 vs KT90

Input/Driver tubes:6922 vs. 12AU7 vs. 12AX7 vs. 6SN7

Thanks for any input...and have good holidays..
whatjd

Showing 3 responses by jazzerdave

jazzerdave
163 posts
 
I tend to enjoy most of the circuits I've heard that were designed for (and use) EL34's with 6922 or 12AU7 driver boards. However, it really comes down to your tonal preferences, the efficiency of your speakers, and which designs will work best in combination.
jazzerdave
163 posts
 
By the way, the 6DJ8 was originally designed for TV tuners and can work in circuits to produce a ridiculously broad frequency response. An amp that uses the 6DJ8 in conjunction with the KT88 can fool you into thinking you're listening to solid state. I find that the 6DJ8 with the EL34's keeps the warm mids with increased bass and highs when you compare it to the 12AU7.
jazzerdave
163 posts
 
Facten - I agree about the non-mid range response of the EL34; however, I have an original circuit design ST-70 (upgraded every component/increased capacitance, but didn't alter the circuit) that outperforms all of my 200W/ch SS gear in the bass and highs. In general though your thoughts on the EL34 are correct.

Also, the Shuguang Treasure are great.
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