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Tekton Double Impacts

Anybody out there heard these??

I have dedicated audio room 14.5x20.5x9 ft.  Currently have Marantz Reference CD/Intergrated paired to Magnepan 1.7's with REL T-7 subs.  For the vast majority of music I love this system.  The only nit pick is that it is lacking/limited in covering say below 35 hz or so.  For the first time actually buzzed the panel with an organ sacd. Bummer.  Thought of upgrading subs to rythmicks but then I will need to high pass the 1.7's.  Really don't want to deal with that approach.

Enter the Double Impacts.  Many interesting things here.  Would certainly have a different set of strengths here.  Dynamics, claimed bottom octave coverage in one package, suspect a good match to current electronics.

I've read all the threads here so we do not need to rehash that.  Just wondering if others out there have FIRST HAND experience with these or other Tekton speakers

Thanks.
corelli
aricaudio's avatar
aricaudio
273 posts
 
@charles1dad  and @sbayne -  With regards to AC or DC. With Pentodes, tight twisting and layout of AC filaments can reduce all but the slightest of "ear to the speaker" hum. With Triodes, the 2A3 seems receptive to AC using good layout. However larger magnetic fields are induced with higher voltage and/or current filaments tubes (like the 845 which I would only use DC for the filaments). It seems the 6B4G (requiring 6.3 volts at 1 amp), would be a good candidate for AC heaters (since the draw and field is not large- even the KT series tubes get by with AC- and they draw almost twice the current). AC seems just a hair more "lively" in my opinion. That said, a good, simple circuit with respect to layout/lead dress, and using good quality parts in the signal path, and a good driver stage- should still yield a very lively system. Aric
mac48025's avatar
mac48025
672 posts
 
Hells Bells, what's with all of this AC/DC talk? I don't have any of their cd's, maybe I should :)
aricaudio's avatar
aricaudio
273 posts
 
@mac48025 - I'm really stoked that you're still loving the Transcend 88/120 amplifier, and I agree the 150's don't have the same "magic" in the midrange as some of the well-regarded KT88's. I occasionally switch back and forth between the types- and for loud, highly-percussive rock, or fast paced metal (I admit to listening to all genders of music regularly- but with a lean more towards alt-rock or jam-band), I think they can give a presentation of a good quality tube sound- but with power "feeling" more like it's in the 60 watt per channel range. However when I go back to critical listening (and not a "crank this baby up" type of song), I feel the midrange lushness of the JJ blue glass 88's in this amp are VERY convincing in presentation towards true SET realism. 
aricaudio's avatar
aricaudio
273 posts
 
Also, something to note- is the 6G4B is capable of 5.5 watts RMS in single-ended mode (single tube), as opposed to 3.5 watts for the 2A3. Parallel 6G4B can do closer to 8 watts (the same as a single 300B). 
charles1dad's avatar
charles1dad
10,250 posts
 
Hi Aric, 
I really appreciate your clear and thorough answer.  Some really hard core diehards tend to favor AC heating particularly for the 45 and 2A3 tubes. The 300b seems to be the dividing point  (in terms of power) and above this level (say 211 or 845) then DC is preferable for the reasons you gave. 

I've had some very experienced builders say the same as you in that DC can sound every bit as good as AC. Given your knowledge I was interested in your take on this topic. Thanks again. 
Charles 
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