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Inspire by Dennis Had Enjoying Vacuum Tube Audio

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Old 10-18-2021, 11:46 PM
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Simonatsea Simonatsea is offline
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Originally Posted by Bombadil View Post
Have never heard them, but can say that Tekton purposefully inflates their sensitivity specs. Instead of measuring their speakers out in the middle of a deadened room, they place them into the corners of a live room. This results in every one of their speakers being spec'ed at 5 to 6 dB more sensitive than they really are.

Every time they get measured in standard lab conditions, the measurements are that much lower. So the SET 12 being spec'ed at 96 dB means that it really is 90 or 91 dB.

This is also quite evident in those speakers with just one woofer. The woofer they use is spec'ed at 90 dB by the manufacturer. So the speaker can't be more efficient than that.

There is no industry standard or monitoring of these specs. And since they actually can measure at 96 dB under some condition, they can get away with this.

They may sound great.
I have read that before as well, sensitivity is something to think about. I have yet to hear any Tekton product. I’ve owned Zu audio speakers in the past and I believe similar has been said about their speakers, however they have simpler crossover and a compression driver for the HF. I found my Soul Superflys very sensitive but no way to tell if they were really 101bd/W…
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Old 10-19-2021, 12:55 PM
Bombadil Bombadil is offline
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Originally Posted by Simonatsea View Post
I have read that before as well, sensitivity is something to think about. I have yet to hear any Tekton product. I’ve owned Zu audio speakers in the past and I believe similar has been said about their speakers, however they have simpler crossover and a compression driver for the HF. I found my Soul Superflys very sensitive but no way to tell if they were really 101bd/W…
Yes, Zu does the same thing. They inflate their sensitivity specs by 5-6 dB. Even Klipsch is doing it on some of the lower priced speakers.

Of course they may still be fine sounding speakers and work well with your amp.

The issue is if, say, someone with a Paradigm speaker spec'ed at 91 dB ditches it and purchases a Tekton or Zu spec'ed at 96 dB, they will find that there is no increase in volume at the same preamp settings. Because Paradigm specs are right on the money and the others inflate theirs so as to have greater appeal to those with low power amps.
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Old 10-22-2021, 10:39 AM
khill007 khill007 is offline
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Originally Posted by FloridaBoy View Post
I could have had a pair that did not come from Dennis that were duds.

The 2030 is indeed a special preamp.
I can confirm this...and I've only had the 1st upgrade to the pre Dennis offered. I have not sent back yet for most recent upgarde. No time?!?
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Old 10-23-2021, 11:47 PM
Isaacc7 Isaacc7 is offline
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After talking to two techs I've decided not to pursue the 12v option for the input tube. One guy thought it was possible but worried about noise. The other said that putting another transformer did carry a noise danger. On top of that he said that it looks like all of the heaters are being fed from a common supply and unloading the input tube could cause an over voltage on the output tubes. Both were going by the picture that Dennis included in the manual emailed to me.

So I decided not to risk screwing up this amp just for the sake of being able to try a few more tubes out. I have several combinations that I really like and will just stick with those going forward.
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Old 10-24-2021, 05:54 AM
FloridaBoy FloridaBoy is offline
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After talking to two techs I've decided not to pursue the 12v option for the input tube. One guy thought it was possible but worried about noise. The other said that putting another transformer did carry a noise danger. On top of that he said that it looks like all of the heaters are being fed from a common supply and unloading the input tube could cause an over voltage on the output tubes. Both were going by the picture that Dennis included in the manual emailed to me.

So I decided not to risk screwing up this amp just for the sake of being able to try a few more tubes out. I have several combinations that I really like and will just stick with those going forward.
Good move. You can go nuts and broke rolling tubes.
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