last time I saw he wrote about it is a Hybrid amps. tube is 12AX7 and OP buffer is NE5532 single 12V power supply. and it say "you can rolling tube in 12AU7 6DJ8 6922 ECC82 OP can NE5532 2134 ...."

      Like this one it can be rolling tube.

Does it made by oneself  can post it on?

Quote: It is means the freqs is 16Khz or high maybe 30Khz. does you think that enough for we want? but in use opamps it can goes to 4Mhz or high. is that right?

Quote: There si a switch on Indeed G2 for changing from 6922/ECC88 (6V) to ECC81-82-83/12AT7-12AX-12AU7 (12V), but you need to increase the bias voltage with 12V tubes.   How does we to increase the bias ?   I means " Can you change sound in change IRF630 or IRF510 how about the...

yes there are beauty.   and how about T-2010 TUBE AMPS from MIT I have see it in this forum but it is disappear. but it is say that can change tube in the same circuit no need change any component. It seems very fun.and can change tube o change sound.   Is any can give a link web to...

Can it change another tube like 6DJ8 or 6922 maybe 12AX7 12AU7 in this circuit? and change MOSFET can change sound? Is anyone hear about Indeed or Bravo how it sound is?

It can rolling tube? great, it is fun for it.