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   Home » Audio Discussions » How to get a LOT of SET power. (107 posts, 6 pages)
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  »  New  More power from Melquiades? More powerful tube?..  A new Icon Audio's MB81 Mono Blocks...  Melquiades Amplifier  Forum     19  243859  09-01-2007
  »  New  NAT Audio Magna -160 Watts of Single-Ended Class A..  The KR Audio ways....  Audio Discussions  Forum     5  71340  11-12-2007
  »  New  Claude Perrier and his tube seremony..  Claude Perrier and his tube seremony...  Audio Discussions  Forum     0  15036  01-05-2008
  »  New  Getting more power from SET vs. properly distorting SS...  Sound Board...  Audio Discussions  Forum     4  48053  05-09-2011
  »  New  The ULF cannel for my new listening room...  The Organic Bass vs. ULF Drivers...  Audio Discussions  Forum     43  122265  07-29-2018
02-24-2017 Post does not mapped to Knowledge Tree
xandcg


Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #: 101
Post ID: 23033
Reply to: 22727
ElPaso TubeAmps
And then there is this guy on Youtube, I think he sell this kind opf stuff:

https://www.youtube.com/watch?v=65ln3YUkUXU
https://www.youtube.com/watch?v=hDpoB2mayb4


Think for yourself, do not be sheep.
06-10-2017 Post does not mapped to Knowledge Tree
xandcg


Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #: 102
Post ID: 23256
Reply to: 23033
Not a refrigerator but...
Not a refrigerator but a serious output transformer. This is from the new Audio Note (UK) Ultra Amplifier, something here and here.

Cheers!



Think for yourself, do not be sheep.
09-23-2019 Post does not mapped to Knowledge Tree
xandcg


Rio de Janeiro, BR.
Posts 218
Joined on 09-07-2014

Post #: 103
Post ID: 25606
Reply to: 22727
EIMAC and Amperex
For my surprise many EIMAC and Amperex models are still begin made and available from Richardson.



Think for yourself, do not be sheep.
08-26-2023 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,591
Joined on 10-12-2006

Post #: 104
Post ID: 27224
Reply to: 25606
170W WTF SET?
I liked a NAT Audio PP amp I heard years ago, but I do not offer any oinions on this astounding amp, except, WTF?!?:

https://www.nataudio.com/products/vacuum-tube-power-amplifiers/item/26-magma.html

Paul S



08-26-2023 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,075
Joined on 05-28-2004

Post #: 105
Post ID: 27225
Reply to: 27224
I think it is typical marketing BS
OK, it is another direct-heated amp with Russian GM-100 driven by a pair of 6N6P. There are many GM-100 amps out there and it certainly a good candidate for high power SET amp.  I never heard of this amp or even never heard about the company, and I have no business comment about it besides noticing that usually the design is very nice. Where however I do feel uncomfortable that they report bandwidth between 9Hz-70.000Hz at 3dB. They use amorphous core transformers that tend to be short for inductivity there is absolutely no way they can get 9Hz. Looking at the dumpling factor claims they made they play with remaping the transformer sections and yes with some very idle setting you can punch the amp to response very high but in this setting the amp will not be listenable full bandwidth. Did they measure 70,000Hz with super idle tube and 9Hz with super loaded tube? If so, then it is very dishonest and in those extreme configurations the amp is hadley usable for full bandwidth sound.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
08-26-2023 Post does not mapped to Knowledge Tree
Paul S
San Diego, California, USA
Posts 2,591
Joined on 10-12-2006

Post #: 106
Post ID: 27226
Reply to: 27225
When Marketing (and a Moron) Kills Sound
I went back and read the introduction at NAT's website, and it makes me suspicious, right away. It makes me wonder if there is an engineer who also has a hard time reading about "his design", or if they all work together to sell expensive amplifiers. There is the usual claim for significant improvements over the previous iteration that I suppose pisses off people who already bought NAT amps. But I think it has long been common in audio that some boutique companies basically sell nothing but Betas. But the biggest question for me is, what are the advantages of this amp over other amps with similar or even more power, driving what might be called "high end" speakers. Of course, the ad clains this amp will drive all sorts of speakers, but I remember hearing the very fine ML2s struggling with too much speaker. I also noticed that there is an "option" to switch the amp from 170W to 60W; quite a drop in power. Why would anyone do that? Maybe the engineer brought them a 60W amp and the marketing guys said, "What we need is 200W!" Who knows? Do any of our readers use this amp, or something like it? What's it like?

Paul S
08-27-2023 Post does not mapped to Knowledge Tree
Romy the Cat


Boston, MA
Posts 10,075
Joined on 05-28-2004

Post #: 107
Post ID: 27227
Reply to: 27226
Does not make sense to me.
I think it is a perfectly legitimate amp. The claim of bandwidth is obviously a marketing BS. Also, I am a bit skeptical of if a pair of 6N6P might deliver significant current to drive GM100 in negative side curve and deal with plate current. They have a second mode what the amp gives 60 watts and I think it is what it truly can do in A1 but I do not want to look into it deeper. The key to all of it would be why the hell we ever need power amp to drive speakers’ full range? With any non-electrostatic speakers, we need 10-20W to drive HF and we do need a lot of power to drive the woofers. This is what DSET architecture is all about. My wondering about a powerful set would be to have >100W amps that will be optimized for LF only with huge size full of induction transformer and high current gap. THAT is what I would like to hear. A powerful SET with objectives to deliver over 100W full range is severely compromised at the level of requirements. If you look online and see the user or demo of the amp then you will see ported speakers with 10-12 inch woofers and very proud owners. I think from a playback architecture point of view it is not reasonable.


"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche
Page 5 of 5 (107 items) Select Pages:  « 1 2 3 4 5
   Target    Threads for related reading   Most recent post in related threads   Forum  Replies   Views   Started 
  »  New  More power from Melquiades? More powerful tube?..  A new Icon Audio's MB81 Mono Blocks...  Melquiades Amplifier  Forum     19  243859  09-01-2007
  »  New  NAT Audio Magna -160 Watts of Single-Ended Class A..  The KR Audio ways....  Audio Discussions  Forum     5  71340  11-12-2007
  »  New  Claude Perrier and his tube seremony..  Claude Perrier and his tube seremony...  Audio Discussions  Forum     0  15036  01-05-2008
  »  New  Getting more power from SET vs. properly distorting SS...  Sound Board...  Audio Discussions  Forum     4  48053  05-09-2011
  »  New  The ULF cannel for my new listening room...  The Organic Bass vs. ULF Drivers...  Audio Discussions  Forum     43  122265  07-29-2018
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