It's like a life long journey. Look how far we've come. I've no doubt we are both enjoying the best in quality sound. For me there is still one more amp that I will be getting from Glenn and that will be a transformer coupled amp using EL11 driving EL12 spez using a tube rectifier. Glenn reckons it will output 10 watts in strapped triode mode.
After this I'll retire or I'll upset the wife too much.
And the fact you're specifying EL tubes shows your high regard for them lol. Plus, if you'd never spied that pretty tube with a red skirt - the EL3N, many of us would never have experienced the superior performance of this family of tubes. And the fact that Glenn himself was so impressed with this tube - as with F-A's amps, at first obviously in a circuit not specifically designed for it! (please note, @JazzVinyl) - that he then designed an amp just for it...the rest is history.
...CHEERS!...CJ And I shall repeat that Lukasz himself has never criticised me for going 'off piste'...the opposite in fact! 
I can only (hopefully) assume JazzVinyl was referring to the extreme/multi tube rolling in his tirade...nothing else has any true validity, given F-A's non-condemnation of my experiments. And as for his 'enforcing' comment...where on Earth does that come from??! We have only ever suggested to like-minded trailblazers that they might be interested in trying something new/different...once it's been proven to be safe. It has never been made compulsory lol! 
...???...Personal choice reigns as much here as anywhere else, thank goodness, and there's room for ALL choices...made all the wider, and more interesting, by the fact that in Euforia and Elise, F-A have made some very flexible, versatile and forgiving amps...so, many thanks to all at F-A!! @hypnos1 that is very well said and reasonable, thank you for sharing your experience and being a "voice of reason." My journey with Elise now has included replacing the stock powers with NOS 1963 Tung Sol 7236, and I am stunned by the magnitude of difference from stock (mostly very favorable). Specifically, the TS 7236 brought marked improvement in clarity and detail retrieval, less “flubby” and slightly more prominent bass, midrange grain gone, nice tone and timbre. The most impressive effect was was a wider soundstage which I really enjoy, also greater instrument separation and impressive spatial placement.Hi LW.
There's a world of difference between using single adapters and multi ones in an amp not specifically designed for such use. All the 'alternative' tubes I have adapted for years now have been extensively tested, not only by myself but many other users also.... and none more so than the EL family of tubes. And although F-A can't officially endorse their use, Lukasz has confirmed to me that he isn't now at all unhappy with them, even though they did find the bench readings 'unusual' lol! And he agreed that they are obviously safe to use, given how long I especially have used them without anything untoward whatsoever, in either Elise or Euforia....further reinforced by my testing of every single internal component's operating temperature, showing that they ran at 10 deg C (50 F) cooler than with stock tubes, and a section immediately below the trafo at 20 deg C (68 F) cooler!!
Therefore, the use of such tubes will not, of itself, cause any warranty-voiding damage. Naturally - as with any tube - there's always the slight possibility of it 'blowing'/arcing, but hopefully our amps' protective circuitry should be able to prevent major damage, and cannot be blamed upon it being an 'alternative' tube. With regard to the adapter itself, although the occasional Chinese one has failed (which Mrsx has always happily replaced), I've yet to hear of it causing any damage to the amp. And I would recommend that if ever anyone has the slightest doubt about an adapter's functioning, it is reported to the maker and replaced...assuming all the usual tests have been made to eliminate any other cause first...ie. swapping adapters/tubes; checking the tube's pins are shiny clean; tubes and adapters are seated properly; all cable connections in the system are secure/clean, including the power supply connector!...etc.
And so, in short, so long as one hasn't gone more extreme than this; taken the usual care in using the amp, and with tubes that I myself have proved to be safe, there's no reason why the warranty should be voided, if the worst should happen...they can (usually) soon determine the actual cause of any problem!...CJ
...CJ
Thank you @hypnos1 ...I will PM @connieflyer . Still a bit torn as to best choice, I'd settled on RCA VT-231 but ran across a comment that they are veiled....I know, may just need to try for myself with my gear. Again, thanks to the regulars on this forum, it is truly a pleasure to chat with like-minded enthusiasts who share my passion for musical bliss and have far, far more experience with how to get there!Hi LW...of the 'conventional' tubes, those grey glass RCAs should certainly be a good choice, with the VT231 giving plenty of bass. And yes, the Sylvanias might well not provide what you're looking for alas, even though the 'chrome dome' versions (and the similar 7N7, that needs an adapter but is usually a good bit cheaper) are extremely good! Another good 6SN7 to look out for is the black glass National Union, but these seem to be few and far between.
@ZRW0 was recently selling off his tube collection, so perhaps he might still have some he can recommend? Just PM him...@connieflyer is apparently looking to reduce his stock of tubes, and I'm sure he also wouldn't mind a PM from you. GOOD LUCK in your tube hunting...patience usually brings results - eventually!!
At least they should do much more justice to the tremendous bass of my EL39/'special' Mazda EL38 power combo than my Dynaudio Focus 110s...(did I mention an also C3g-beating treble sparkle(!), now they have even more hours on them?! Who would have thought power tubes could do such a thing, when conventional wisdom says it's the drivers that determine most of the sonic characteristics? My eyes - and ears - have truly been opened...wide!! . Mind you, it could also be in part that they are in fact showcasing the mesh-plate EL11s as being even more special than previously thought? Whatever, I'm hoping this combo will make my new speakers sing beautifully, just like my Empyreans...if in a rather different way, of course...(can't afford the 30K+ electrostatics you said I might need to match certain qualities of the Mezes lol! 
). 
...CHEERS!...CJ
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Fully understood, AxelCloris...as starter of this, and other Feliks-Audio threads - my very first being closed due to a renegade member, since banned - sometimes it's difficult to maintain an 'even keel' in the face of 'disruptive winds' - edit...nay, provocation lol. But thankfully, the majority of members here - as in other head-fi threads - do indeed manage to 'keep things on track'. Long may it continue...
Hi LW,
