It's very similar to 12au7, but is 1/2 taller and required more heater current, so please make sure that you check with you manufacturer before using the tubes.

Will this tube work in a Mini Torii

Thanks,

Peter

e80cc-BW by JonCatuccio, on Flickr

I went to a  NOS Amperex 7316 (a 12au7 equivalent) and  I am very happy.

I tried a lot of tubes before I settled on the 7316.

Brent Jessee agreed with my selection and thought the NOS Amperex stood out from other 12au7,s or equivalents.

Fireblade,

Something you should consider is that PK only runs his Mini Torii from 1k up in a biamped system (uses a Sunfire below that) so anything he says about tubes doesn't take into account what they sound like below 1k.  A tube with great upper midrange and treble but bad bass and lower midrange could sound fantastic in his system, but not very good in others.

PK, please correct me if I'm wrong andyou are now running your MT full range.

I am also using the Mazda 6v6 GT.

Please also talk to Brent Jessee about these tubes.

Peter

This is what Brent Jessee suggested:

Drivers:

1. 5965 Telefunken diamond mark, $200.00/pair

2. 6211 Telefunken diamond mark, $180/pair

3. E180CC Amperex pinch waist.  Superb sonics, slightly warm.  $250.00/pair

6V6's:

1. 6V6GT RCA grey glass $109.00/pair

2. VT107A military 6V6GT RCA made $130.00/pair

3. 5992 Bendix Aviation aircraft grade 6V6GT military type $399.00/pair

Mmmmhhhh  ...   tempting, but too expensive choices

They also drive the output tubes ... don't they?

BTW, switched back to the old Brimar 12AT7's, as these have better synergy with the Tekton Lore 2.0's, believe it or not! Seems as if the DM945's would yield to the beaming energy of the peppy Brimars. Tektons seem to absorb that energy seamlessly ... OTOH, the RCA 12Au7 black plates work better with the DM945's, as those are much more laid back.

You may be right, but I know my preamp input tubes (i.e., 12A*7's) really modify the behavior of my output tubes. Sort of as if these were driving them. Since the Mini does not have an intermediate position like the Jolida, in the Mini case those preamp tubes may be actually driving the output tubes. But, I stand corrected.

Semantics apart, I'm discovering a new set of potential rolling possibilities stemming from the speaker replacement. What Works ideally for one set of speakers does not work necessarily with the other. This is all new and unexpected for me, as now another variable joins the tube-rolling complexity and leverage.

I'm getting my Tung-Sol 6V6 GT's back again, with great success. Next, I'll re-try the 6414's I had discarded with the DM945's, and see what happens. At the center of these possibilities is the fact that the Lore's allow use of the Brimar 12AT7's (a beamy and hard to match preamp tube), without issues, so new synergies are now posible.

The Lore's are opening up tangibly now, and I'm liking them so far.

Well, that settles it. Thanks to both for correcting me. I should call them preamp tubes, as this is what they do in my integrated. Evidently, they feed triode line-level amplification, so they definitely affect the output, but not necessarily by 'driving' the output tubes. I stand corrected.