Tekton Double Impacts

Deadfan23,

The DI's are amazing and would work in your room but Eric's advise would be best to go on. I don't know of anyone that's actually heard the Ulfberhts but something tells me they will be out of this world. Since the Ulfberhts are from Eric's PMD line and labeled as the ultimate reference speaker I'd lean towards them over the 1812's but I'm sure there are things the 1812's can do better than the Ulfberhts for certain types of music and listening levels. I think Eric will be getting asked about the differences between the Ulfberhts and the 1812's. He will steer you in the right direction.

iamasif,

im using Herbie Audio giant threaded gliders with great success. They sure make moving the DI's much easier. 

Deadfan 23,
I agree that the DI's would be plenty of speaker for your room.  Now as to which one would please you best--tough call.
You might be very wise to await Terry London's review of the Ulfbrecht if that is in your budget. Will it sound 4x as good as the DI's?  No, but it certainly ought to do some things better given the cost difference.  More effortless, even greater clarity, deeper soundstage--we shall see.  But I do believe that the DI's will remain in the sweet spot on the performance/price curve of the Tekton line.
As for the 1812's, I don't have a clue.  I have to believe they would sound different from the above two speakers as the driver configurations would have different appearing wave launches and dispersion patterns.  One question I might have with the 1812's--can the woofer  be placed against the front wall and the the other two arrays be brought out into the room to optimize bass extension (which probably is not a priority for you) while maintaining a great  sound stage?   I only bring this up because in my dedicated room I have the DI's 6 feet from the front wall.  They sound great--but they do not go down to 20hz.  Probably 32 would be my guess.
So far, Eric is the only one who has heard all three, so I'd be asking him very focused questions on the things that are important to you in a speaker.  Good luck and keep us posted on what you find out.

For immediate release
June 2nd 2017

Tekton Design LLC - we’ve completed the design phase of the patented Ulfberht loudspeaker....

Eric Alexander - Designer
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Hey Eric,
I’m loving my DIs, but I’m also excited about the Ulfberhts.

I don’t suppose you would consider offering any trade-in or trade up program for recent DI owner’s who need an excuse to upgrade?

Just think about it, because I am thinking hard about it. ;-) 

Thanks for the encouragement David, mac and corelli.

Nice sidestep Eric!! As suggested will wait (eagerly) on Terry London's upcoming review on the Ulfberhts before committing to either them or the 1812's. 
I must admit I felt excited when I read Eric's description of the Ulfberhts on his website under Details & Specifications:  
Eric, how about an opinion from the source (you) as to your preference? Which in your opinion is the current flagship model?
Will the Ulfberts have walnut as a finish option?
Graham 

I have the Pendragons and they are the best Towers I have ever owned.Full range and sound good with Tubes or Sand amps.I drive them with either 2 Emotiva XPA100’s or a Primaluna Prologue 5 with KT88’s.I have some KT120’s for the Prologue 5 but have not rolled them in yet.I feed those amps thru a Schiit Audio Freya Tube Preamp.That purchase represented the most I have ever spent on stereo gear.I am a budget Audiophile I guess.