What other tubes have you tried in your signature 16 so far?
I can't wait to read your impressions of the LIO since you have a S16 right now and will be able to compare the two
Sorry I haven't responded sooner, just been busy. I gave the stock JJ a fair bit of time in the Sig 16, of course, as well as a 12v (5751) JJ… both performed similarly, fine, safe… I'm glad JJ tubes exist. But, on to the fun stuff!
I actually ran a Yugoslavian RCA 12AX7A in the Sig 16 for quite some time. I pulled it from an old shortwave kit radio, and that tested shockingly well given the condition of said radio (which, to be fair, worked beautifully despite looking like I'd pulled it out of the ground). But, fun reminiscence aside, that's neither here nor there since (for the time being?) the LIO only gets 6v tubes.
In the relatively-affodable category, I was incredibly impressed with the performance of the Philips JAN USA 6922. $30 tube, and I left it in the Sig 16 for a while, felt like the bass may have been a bit lean, which is an issue with my Audience speakers. But it was very listenable, and as I said, listen I did, for quite some time. I might get a second one (matching, be damned!) for LIO just for kicks.
I've also run the Telefunken E88CC, which is just… an awesome tube no matter what you're putting it in.
Currently I have the comparably awesome Siemens CCa inside Sig 16, and have (as one would expect) no complaints.
So what goes in LIO when she (she's a she, right? she's name after three ladies after all…) arrives? Well, the CCa has a cute twin, and my Telefunkens are a twosome as well. I also have a set of National (MiJ) 7DJ8s that I have yet to try in Sig 16 for whatever reason, but which will certainly make their way into LIO. And, as I said, I may very well get a friend for the Philips JAN. Should tide me over for a while.
I'll definitely contribute to the inevitable LIO tube rolling thread, so… check back in January, I guess!