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I have to tell you something: I do not believe to audio people. Whatever they say has some freakish twist of desire to present the sings in a certain way instead of witnessing and experiencing the thighs as they are. This is one of the reasons why I generally despise the DIY community: they are incredibly boring in their everlasting hobbysm.

I also hardly believe myself is I have no reasons to know the things defiantly. Above I make a bunch of the observation about the 845, 211, GM70 but I never had any of them in my listening room. Since I have seen very few people who preach the playback system and sound reproduction from the positions that I consider “serious” then what evidence I have that those somebody else’s 845, 211, GM70 amps meant to be “serious”? Yes, it is very much correct that my comments above about the powerful triode were based on bad examples or heard in context of bad installations. So they should be understood appropriately. 

It is very difficult to talk about the soldering people about sound. For instance today I read a witnessing of Nicholas Chua about his observations regarding his GM70 amplifiers:

http://diyparadise.com/nikcgm70.html

I like what he did  more or less and what he wrote. In the end he mentioned a little about his perception of the GM70 sound. That part I got different:

Nicholas Chua wrote:

The Sonics of the amp I would not lie to you, it is great with lots of potential. Feels like a very powerfully 300B and 2A3 amp. It has the nice midrange of the 300B but with the balance tonal of the 2A3. Bass control is excellent here and the amount of bass that can be pump out is insane for a SE amp;

What? What I experienced the properly implemented DSETs do deliver insane bass, not juts insane but absolutely unreachable by any other topology. Yes 300B never has bass but it also never has anything else beside 3-4 octaves on the middle. So did Nicholas discover a good bass with GM70 or he discovered a better bass then 300B?

Nicholas Chua wrote:

there is more high frequency extension with this amp then my 300b amp.

Good grief! A telephone has more HF then 300B!!!

Nicholas Chua wrote:

What I like in particular is that at low volume and high volume the sonic character is the same.

Actually it is very interesting quality. But the very next question I would ask what kind loudspeakers Nicholas uses. Usually the sonic character falling apart at high volume because the 300B and 2A3 die driving sub 100dB sensitively. 35W of the GM70 would defiantly help. The 350W of the SS A/B PP would help also… :-)

Nicholas Chua wrote:

This trait shows the control and power sufficiency of the amp to control the speaker when both posh listening and the wild rocking head banging volume levels is played. The amp plays both rock and other music well. Ziggy Stardust by David Bowie plays now with me rocking in the middle.

No comments…

Nicholas Chua wrote:

Because of good bass control, double bass plays with great authority. The expansion of the double bass is now very apparent like the how it should sound when you stand/sit 2meters away. Normally in most amps, the double bass is the often miss played instrument where the sound is muffled, not there at all, worst the box is heard but not the string being plucked.

I was under impression that with 140R on plate of 6C33 is possible to get much more interesting bass. Taking about the DSET…. The single channel of Melq will have 15000uF in B+. I wonder how mach space this capacitance would take if it were for 1500V and how many extra turns the amp would have in the output transformer in case the GM70.

Nicholas Chua wrote:

New World Symphony Largo LP Brass sections did not lack the speed and timbre associated with SE amps but it is noted that it is still slower than it should be. Because of the non-feedback the speed is not compromise where feedback tends to muddle with the speed as some of the signal is feedback to input thus slowing the sound. But with all SE amps there is more swing in orchestra pieces.

Honestly I did not understand it.

Nicholas Chua wrote:

Separation of the instruments seems to be good too and there clear audible distinct between instruments being played not just a sound wall.

Is it after the 300B? I think the same effect would be if Nicholas would drive his speakers from 8-track car radio – it is the 300B is meant for…

Anyhow, I certainly did not mean to mock the Nicholas’s view but I juts do not see so fat the credible views of the GM70 builders. If someone feel that they have something to say regarding the SOUND of the GM70 vs. 6C33C then feel free to do so.

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