2 Ohm Tekton Pendragons

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.

There are good sounding amplifiers that will drive two ohm loads but they are very few and far between you have a lot to worry about because the speaker will require four times the amount of current from the amp as an 8 ohm load would and if the amp is not capable it will sound thin and bright which you do not want. The problem is that all of the newly manufactured speakers over the last few years are dropping their impedance because of cost of manufacture of the drivers because it takes way more wire and a stronger coil and cone to make a high impedance speaker as well as a better basket, spider, magnet and every other part. It all boils down to cost and sticking it to the customer. Try and find an 8 ohm or higher speaker and give it a listen you will not be disappointed.

First of all, kudos for Tekton, for calling them out what they are, 2 ohms! Finally, a company who is honest about ratings. (Instead of the "4R with dips below 2R" pure BS advertising - it's either 4R or 2R... impedance is defined by the lowest dip, not a random convenient number.)
That being said, here's what not being said:When speaker impedance is halved, the speaker cable has to carry TWICE the current for equal output. That is, you are effectively cutting the speaker cable down by 3 gauges with every halving of impedance. Thus, a 2R speaker needs x8 the current as a 16R speaker does. Hence, you need x8 THICKER speaker cable to get equivalent results! So, if you have AWG10 speaker cable fro your 16R speakers, then you need a total of AWG1 speaker cable to get equivalent bass performance as said 16R speakers.With my 16R speakers I can tell a massive difference between AWG12 and AWG10 speaker cables. (Hey, I'm bi-cabling with two AWG10 runs!!!)
So, not only does the speaker become impossible to drive as impedance drops, but your cable also degrades exponentially.
To have GREAT bass from 2R speakers, you will need 8 runs of AWG10 speaker cables to feed it...  or, if you want to simulate my setup in a 2R scenario, then it's 16 pairs of cables! (Total AWG00!!!!)
That will cost way more than the speakers do. Plus, you need that heavy internal wiring as well. NOT possible to hook up that much to the drivers tiny connectors....

Common example: you have an AWG12 speaker cable, which functions as AWG12 for a 16R speaker. You connect it to a 2R speaker, it will function as an AWG21 cable would for a 16R speaker!!! A mere fraction of a lamp cord. Makes for terrible bass control.