What have other owners of Tekton Design Ulfberht Speakers discovered?

Now that I have lived with the Ulfberht's for close to a year I would like to share some assumptions about them with GON members, and see what conclusions that other Ulfberht's owners have come to based on their listening experiences. 

There is no doubt in my mind that the Ulfberht's are the most lifelike and musical speaker I have ever had in my reference system.  To think that a seven foot 21 driver speaker completely disappears in a totally accurate sound-stage,  (how large or small is based on the recording) like a small two way monitor is still a remarkable feat, indeed.  Many listeners to my home find it hard to believe how cohesive they are top to bottom and speak with "one voice".  Many large speakers can do "big" power music, but sound "big" on all music.  They can also blow out of proportion the size of individual players.  Not the Ulfberht's, they present any music in a natural manner, never exaggerating anything out of proportion.  Other special qualities of this speaker is it's overall "ease/effortlessness" regardless of volume levels, thunderous dynamics, its ability to pressurize the room with deep accurate bass frequencies and a sense of "aliveness" that you find in live music.

Some guidelines to optimism the Ulfberht's performance:

1) Get them at least four feet off the front wall and two/three feet off the side walls. My dear friend Ezra has his pair in a relatively small space, yet they sound beautiful.  Still, his pair is about five feet off the front wall and two feet off the side walls. 

2) I believe in most rooms a very slight toe-in gets you the the best center image, without narrowing the width of the sound-stage at all. The center tweeter should aim just on the outside of your head at your listening position.

3) Just like all Tekton Design speakers the Ulfberht's are a conduit, anything you put into them you will hear it.  Be prepared to use the finest source and amplification to tailor the sound of your system to your personal taste.

4) Even though the Ulfberht's are an easy speaker to drive, they love high current amplifiers to get the best out of them.  Right now, I have in for review a brand new model from Coda Technologies called the Number#8, beautiful looking with blue lighted meters, which has the current capability of 150 Amperes on a peak!  Without a doubt the Coda Number#8 is a superlative amplifier, you will get all the details when I write the review for hometheaterreview.com, and might be the best amplifier that has ever driven my pair of Ulberht's.  I have have tried six highly regarded amplifiers, they are all excellent in their own right and sounded great on the Ulberht's.  However, the synergy with the Ulf's is very special in many ways.   

@teajay  Thanks for starting this thread. There are Ulfberth related posts in @corellis 's DI thread...perhaps those folks can post summary experiences and findings here as well.

Your guidelines on optimizing the Ulfberths are super helpful.

As you say... I was really surprised by how well Ezra's Ulfberth BEs perform in his room. Given this, I would have no hesitation in bringing a pair into my slightly larger room. 
Mine are 4 feet from the front wall and 3 from the sides. There is 8 feet between them with my seats 10 feet from them and they are toed about 33 degrees. I tried a number of positions beginning with them facing straight ahead but the stereo image was poor. To complicate matters I have 2 seats side by side so I wanted a stereo image that was the same from each seat so it needed to cover about 3 1/2 feet. After much grunt work the mission was accomplished as these speakers are not easy to move. 
Looks like there are only 2 Ulfberht owners out there........hmmmm.
mr-m I don't remember seeing this post back in October so it might have gone under the radar a little.Sometimes Audiogon will quickly take down some postings & leave others up for days. I only found it because I wanted to see what Teejay has recently posted.
Do you recommend using Herbie threaded studs to move these heavy speakers around?
Herbie’s Giant Threaded Stud Gliders are a great solution for isolation and stability benefits as well as making the speakers very easy to move.
"Do you recommend using Herbie threaded studs to move these heavy speakers around?"
Only if you have carpet , if you have wood floors they will mar them unless you put felt underneath them.
That it is not cool to use "want to go back to my place and I'll show you my Ulfberht" as a pick up line.....
Hello All,

I have had my set of Ulfs since June 2018 and absolutely love them! I came from a set of the Tekton DI-SE's which were great in their own right but the Ulfberhts are on a completely different level. As Teajay described in his first post, they really do "disappear" in regard to the spaciousness of the soundstage and ability to be "conduit" to the music. Mine are positioned a little closer to the back and side walls, 2 feet from the back and only 5 inches from the sides due to an "enclosure" where my projector screen is. They are toed in about 30 degrees but the driver array comes out past the sidewalls approximately 4 inches into the room which I am sure helps with the imaging. Speakers before the DI's and Ulfs were Def-Tech Mythos ST-L Super towers, and I auditioned Golden Ear's Reference, a variety of Maggie's and others before settling on the Ulfs. I also have an Ulfberhts center channel and am driving all three of the Ulfs with Wyred4Sound SX1000R Mono-blocks X 3. 
Can the Ulf's be driven by a 10-watt 211 SET amp?
I have several amps I use with my Ulfberhts one of which is the Pass Labs First Watt Sit 3 which is rated at 18 watts into 8 ohms and 30 into 4. The Ulfberhts are rated at 99dba efficient into 4 ohms which I think is a little generous. For almost all my music the SIT 3’s will drive the Ulfberhts but some recordings which are recorded at lower volume levels just don’t have enough volume for me. What the SIT 3’s do play sounds simply wonderful. To answer you question sutts I think you will encounter the same issue but what it does play at sufficient volume levels will probably be magical. 
 After 1 month of owning the Ulfberhts with a Lyngdorf 3400 powering these big speakers I am a very happy listener.
 I experimented with getting a wider sound-stage, as I am a sociable person, and usually have 2 people.
 With much persistence, I tilted the speakers forward approximately 1/2 inch and the sound-stage immediately widened to accommodate 2 people.
 Question: I jury rigged the raising of these speakers with whatever i could find.
 Is there more professional way of just raising the rear? 

@jujubeez  Congratulations, first and foremost. Happy to hear that you are a "Very Happy Listener" now. 

Depends on the isolation solution you are using. I can see doing so with IsoAcoustic GAIAs, Herbie's threaded Giant Gliders, SoundoCity outriggers, Townshend, etc. etc. (as some examples).
How do the Ulfberhts compare to other high end speakers (revel salon 2, Focal sopra 3 etc).

Also I wonder if anyone has heard the new BE version. All those Be drivers look amazing.
Just received mine on Friday, I have about 4 hours playing / listening and they still have a lot of break in to go, but I can tell how great they will be. I currently am driving them with Parasound JC1 monoblocks / JC 2 preamp.  Waiting on a pair of Allnic A6000s which have 300BXLS so they will produce 60wpc of beautiful SET magic.  Also waiting on an Ayon Stealth DAC/Preamp.   I am sitting about 18 feet away, have them approximately 11 feet apart, about 5’ from front wall and 3 1/2 off sides. Any suggestions would be very much appreciated.  I love a big soundstage with accurate reproduction.  What is the typical break in time?  Also breaking in a new pair of anti able speaker wire as well.  Thanks, Bob
@rmd1114 Congratulations on getting the Tekton Ulfberths. Your choice of the Allnic and Ayon pairing should sound absolutely wonderful on this speaker. I imagine, as the Ulfs continue to break in, you will be in for quite a show with your Parasound gear. Keep us posted!
Anyone thoughts on how the Ulfberhts compare to other speakers?

I am about to listen to a used model with a central Be tweeter and surrounding fabric tweeters.
@smodtactical  Is your audition in a home setting or at a dealer? I'm curious about your take as well as the system components fronting the speakers you will be listening to.

Some reviewers have elaborated on comparisons to other speakers. 
@rmd1114 out of the box the Ulf’s were showing potential but they were like a puppy that was eager to please but the coordination wasn’t quite there. As they were breaking in ,I had to occasionally move them to get the stereo image I was looking for. All told I think I had about 100 hours on them before I was completely satisfied. Once they reached that point they literally disappear. One of my buddies was shocked at the soundstage stating “I didn’t think a speaker that big could disappear like that”. Also once they are broken in and you know how they sound,  they  will very quickly tell you whether any changes you make upstream are a positive or a negative.
I have had my Ulfberhts since early March. It is the most significant audio upgrade I have made in the last 40 years. I have never heard any speaker even close to this price that sounds like this. Their specialty is providing the illusion of live music. Listening to them is great fun. They were a great buy at $12K. At $9K they are a steal.

I have been using the Parasound JC2/A21 combo with excellent results. I am going to try a Yamaha A-S2100 next week.