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First of all it was quite interesting and quite educational. Second of all it answers no questions but rather creates more questions. Here is what I try to compile some my observations and thoughts on the subject.

I have a local guy who red my site and   who in response to my “DHT Challenge” got in touch with me and proposed to try his amp. He is well-familiar with DHT, owns a few of them (45, 2A3, 300B) and proposed me to bring to me any of amps DHT amps he owns. I proposed to him to choose an amp that he liked the most. His feeling was that one of his 300B amps was the most interning. He noted that he doesn’t like mach 300B amps but according to him this one has something special in sound that he very much appreciates. 

There are few things shell be addressed. I do not know this guy, I never heard his playback and I have very limited or any ideas what he is doing or trying to do in audio.  Those few hours that we spent together characterized him as lucid and coherent person, even though completely dead musically.  What however I did appreciate in his was his complete absence of that idiotic audiophile pride of ownership. The audio idiots usually are accustom to bind accomplishments and failures in audio with something “imaginary more important” and they go extremely personally about audio judgments. This guy seemingly was not exposed to this idiotic plague and he was not personally wasted in all of it. His attitude was: let see what happen – my type of guy. Furthermore, since he knew that I might mention our experiment at my site he asked to keep the identity of his amp private. All that I will say that it is slightly altered version of a commercial amp with 300B in output, that it come from a brand that I do not particularly like, and that the amp’s retail sticker is a few tens thousands dollars – it is very expensive amp, and according to the amp owner “it is not just another 300B but the best they were able to do for 30 years”.

In order to give an idea about the amp generals outlook but hide the identity I would say that the driver/s of the amps might be fine in here:

http://www.westernelectric.com/support/we_spec_sheets.html

I will not say more to identify the amp. My expectations were very low and I did expect that Milq will eat this 300B alive. From certain perspective it was what happened. There is another perspective however…

Initially I did some Moronic listening of my MF channel driver by DHT vs. Milq when I just forgot that my Milq have built-in filters inside. I am so accustomed that my amps have all inside that is necessary to drive the channel that I was driving MY OPEN DRIVERS with this DHT, getting horrible sound, and pontificating that it “sounds like a typical 300B crap”. I kid you not.  Then I concluded that that this DHT is just broken and suggest to puck this hit up I did not believe that such a huge sum of money might be asked for this amps that has sounds more horrible then a cheap portable AM radio from 70x. I way much beyond what I expected. Then, while we were packing the DHT, it suddenly come to me that I was an idiot and that I just forgot a need to use a speaker filter the DHT’s output!

I was laughing on myself and I made a break. When I got back home I put 3uF cap after DHT amp and tried it again. It was of course a different story and the DHT had something more or less contestable. Contestable but not truly sound acceptable in my view as the DHT amp had very dry and grainy sound with some very-very heavy and very annoying me “throaty” colorations.   I keep playing it, doing something else, as I had no more interest in this sound. But as time goes by I noticed that the “throaty” colorations were subsiding and the amps literally before my eye was self-transforming, like those dues in “The Transformers “movie. In half hour I went back to my listening spot and to my big surprise the DHT sounded just wonderful, with no signs of irritating throaty colorations, very nicely balanced dynamically, tonally and hydration-wise if you insist. Ok, now the game is on, I figured.

I spent some time listening the sound of this DHT amp driving my MF channel, then Milq’s single stage driving my MF channel, then DHT driving full range my Injection Channel and then a full-range Melquiades driving my Injection Channel, the amp “C” on the circuit below:

http://www.goodsoundclub.com/PDF/6-Chennal_Melquiades_DSET_Amplifier.pdf

There were some educational for myself observations made, in some way saying something about this specific DHT and in some way saying something about Melquiades’ single stage version and the Melquiades’ full-range two-stages version. Differences were very clean. The heads off to this DHT amp, I do not know if it was a good DHT of bad one but it was superbly instrumental in what I was looking. I will pass my observations and interpretation of the results in the second section “My DHT experiment: Observations”, I will right it most like later on this week when I have time. It will be then the third section “My DHT experiment: Concussion”. I am not ready to say that this section is formed in my head, I still thinking about it but I have already some in my view very interesting and stimulating ideas. Stand by if you are curios.

Rerurn to Romy the Cat's Site