Tekton Double Impacts

The output impedance of my preamp in tube gain mode SE is 210 ohms. Is that considered high?

No, not in itself. However the majority of tube preamps have a coupling capacitor in series with their outputs, which in some cases can cause their output impedance to rise from relatively low values at the mid-range frequency the spec is usually based on (e.g., 1 kHz), to as much as 3K or 4K in the deep bass region. (The impedance of a capacitor increases as frequency decreases).  And in many circumstances that **variation** in output impedance can be more of an issue than the 3K or 4K value itself.

I couldn’t find relevant published measurements on the Freya, so it would probably be a good idea to ask the manufacturer what its output impedance in tube gain mode is at 20 Hz.

Regards,
-- Al

porscheracer - "Do the Rothwell attenuators alter the sound signal. I suspect they must. Any experienced there?"

No negative impact on the sound that I could detect. Rothwell's website is quite good explaining how they work.  I bought mine awhile ago but I think they are around $50 so not a huge expense either. 

@333Jeffery  - My oh my, your video is getting around! :-)

http://www.whatsbestforum.com/showthread.php?22616-Tekton-Design-Double-Impact-Reference-Loudspeaker... 

I noticed that...wow, your Ulfs aren't that far away from the front walls. Can that even be a foot behind your speakers? What's more, really no space to speak of the side walls, either.

This seems to be a reoccurring theme, that the Tekton speakers don't necessarily need that much room to breath, or shine. I've seen it myself at Raven Audio and Bullitt's house.

Terry, on the other hand has his Ulfs really far from the front and side walls.

When I spoke to Eric he said maybe a foot from the front and side walls, and said that he wouldn't make a claim that any more distance would do much good. I imagine, like any speaker, that the placing is going to be room dependent, yet I still wonder that what if @teajay placed his Ulfs very close to the front and side walls as a part of his review, he might answer some questions for those people who are thinking about buying Tekton, but they wonder if the larger models are too large.

Like teajay I found the DI's to sound best out into the room. Having said that they still sound very good close to the back or side walls. I found the same went for the Enzo's. It's more surprising with the DI's though as they are rear ported and I assume the Ulfberhts are also. Great sounding speakers that aren't fussy about placement.......gotta luv it. 

@mac48025 - Hmmmm...curious. You know, I can't remember exactly what Eric said, but he said that the ports on the back of his speakers don't act as usual ports. I'm not sure what that was about, but maybe @tektondesign design can talk a little bit about that. Because, as is, they seem to exhibit characteristics of full range single drivers that I've played with, inasmuch as sure, they sound better out in the room, but you can get them pretty darn close to the wall. I mean, it can't be magick. There has to be some science behind it. 

At any rate, I'm committing myself to at least learning the basics of the Sumiko method of speaker placement, because it should work in any room, to let the speaker/room pressure paradigm play itself out in a natural way.Then add room correction and/or treatment as needed...*if* needed!

The only speakers I have in-house as the moment are Dynaudio 340s, so if I play around with them an the Sumkio method and come out aces, with better SQ, I would imagine the mini-Ulfs would work much better, whether the room dictates a few inches or a few feet.

http://www.audiocircle.com/index.php?topic=60819.0