2 Ohm Tekton Pendragons

Yup.  Case closed.   Next controversy....

I'll pile on here and agree with what's been said already. No need to design 2 ohm speakers, especially if the intent is to use tube amps. The easier the load, the better your tube experience will be.

IMHO

If they are like most bass section, they will go from 2-22 ohms without some type smoothing. Phase shift of that magnitude from a bass driver is demanding enough. BUT below 2 to over 20 ohms @ 2-400 hz. That is the reason for the bloated bass a lot of tube amps have.. The fact that they ARE doing bass duty and have a swing in load.. Load demands and quicker response from a power supply (hexfred) make a big difference..
BUT relieve the valve amp bass demands and it just works BETTER in the mids and highs.. 2 ohms though.. on a valve amp is just a NO NO..

In an automotive application it’s not uncommon to see 1/2 ohm loads to PUSH an amp.. BUT have you seen what it takes in cable size? IT’S JYNORMUS. A lose connection is a fire.. Have to TORQUE the lugs, AND you better use a contact enhancer for the power supply.

Home use, you better keep the connection tight to @ 2 ohm, too. STUFF will get hot... Not a question of that.. Class D get hot too.. HOW HOT?
They will MELT and talk about STINK...

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 VAC could theoretically be a solid match.

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They might push the load, BUT they don't like the load.. Mcintosh is the same way.. 2 ohm loads though.. sound BAD on a Mac.. Just a fact.. 

Regards

@rhljazz,
BTW the  discontinued VAC Kevin Hayes designed Renaissance models were 300b push-pull ciruits(1990s) have 2 ohm speaker taps to use if push came to shove. Nonetheless they were at their best sonically when driving higher impedance speaker loads. All one had to do was listen.
Charles

I remember that late Vince Bezdecheck (muralman1) drove 1 ohm Apogee Scintillas with 500W (Icepower based) H2O monoblocks (rated 2 ohm) with great results.