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Old 29th June 2007, 09:44 AM   #1951
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Default Yes Gaetan.... and the worst part of this game is that some people

are able to fool themselves..... they really "feel" the expensive things as better.

If you prepare a testing, if they can detect the one match their beliefs...they will evaluate the expensive one as better.

If you prepare A to B testing (they will try to run out of this test)...result may be different.

Ask one of those guys to prepare an A to B....they will say very difficult,that is very hard, they do not have switches, they do not have conditions to adjust amplifier to the same power, or this adjustment is impossible because of dinamics, will say the speaker may cooperate to one amplifier beeing bad to the other.

Will can insist, finding the solution to each one of those problems...when no more chance to scape, they finally will say that do not believe those testings...

ahahahaha

This effort to maintain their beliefs, to keep the "status quo" is a need not to feel themselves "foule"..... something really needed in our social life.

Try to imagine if we decide to make A to B testing into our marriage!... marriage will not be stable anymore, as you will be replacing A to B continuously....not good to society.

So.... reality is something many folks do not want.

Try to imagine someone that have spent 500 hours developing a DAC and an excelent amplifier.... his design, his construction, his development.... his life.... maybe his honor inside that enclosure.. let's say containing the DAC and the amplifier...the maximum possible sonics for the guy.

Now you offer to him a chip amplifier.... let's imagine he will install the chip amplifier..... a very cheap integrated circuit, underpowered, compressed and all those things...... and them the sound turns better....much better.... clearly better for you.

Do you know that he will perceive.... cheap dirty sonic!

the man cannot perceive it as better...this will be to accept to receive the "Certificate of Idiot" as he dedicated enormous time, money and effort into expensive, special, ferrite beaded circuits and them that simple thing did that....no chance.... the brain produces the invertion and the guy goes believing.

I think the market to audiophiles is wonderfull, as to feed those beliefs you can turn milionaire...attach a glass with a diamond shape into your panel, put a lamp behing and you see the Diamond Sonic that will born...ask 30000 dollares and ready!

My rich future after the construction of Diamond Sonic amplifier you can see in the image.... Ali Diamond!

regards,

Carlos
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Old 29th June 2007, 10:30 AM   #1952
sandyK is offline sandyK  Australia
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Default Destroyer X Amplifier...DX amp.... myamplifier

Carlos and Gaetan
You may have noticed elsewhere that Hugh Dean has said that he uses input devices matched to better than 2% for HFE.
In the 100W AKSA, Hugh uses Nichicon Gold Tunes, and for the power rectifiers, he uses Ultra Fast,Soft recovery types.
This is the kind of attention to detail that ensures the highest possible performance from a relatively simple design.
Impressive.

Sandyk
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Old 29th June 2007, 12:14 PM   #1953
Hartono is offline Hartono  Indonesia
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I like your photo there Carlos~~~~
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Old 29th June 2007, 12:22 PM   #1954
sandyK is offline sandyK  Australia
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Default DX amp

Looks more like a terrorist taking a photo of a nuclear facility.

SandyK
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Old 29th June 2007, 02:09 PM   #1955
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Default Ahahaha.... images can have many types of understanding.


Brasil is waiting to have 550 milions of litters of Bio-Diesel this year...and decided to multiply this by 12 to 2010.

It is small..for a while...let's see in a couple of years.

The image was made because we well be the "energy" producers...so...the Arabic expression with some clothing covering head...i am not shaved...so... had some similarities.

This means "rich"....wealthy, as they are the owners of the oil...hummm..for a while.

It's OK related what Hugh told... thank you to remember me Andy, despite i do not use words as final reality...i use to check everything people tell me...even beeing someone i have apreciation as Hugh.

For instance...i have just checked one more....i have made that many times before...a comparison between the CCS installed into my amplifier and simple resistances.

I have made images, this way people may understand i really have made testings.

If you have readed something i use to write.. i do not believe in nothing that was not tested, not compared into A to B... i do not even believe in my analisis, as we use to fool ourselves...you see that i use to repeat to "check myself once more".... no way to me to believe...i have to see, sniff, test,listen, measure, compare ... and i use to do this repeated times.

People foll themselves all time long.... one close friend has an awfull wife...she seems to be a crash of a truck against a Volkswagen beetle.... he use to say she is beautifull..... i cannot see where?

regards,

Carlos
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Old 29th June 2007, 02:16 PM   #1956
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Default I have tried the CCS once more.... the amplifier reduced the sensitivity


of course was adjusted...bias and offset adjusted once more...all voltages checked.

Sound was "undecided".... something that was afraid to get out from the speaker.

I was listening Norah Jones....Not too late..... as you see folks, i use to read forum, and to listen suggestions and to check them all.

Sounded bad...really worst.... seemed to have sligtly more treble....but more distorted the treble..... sound was something flat (not equalizer... flat related peaks of dinamics)

Bah!...is the expression about the result...point to resistances into long tail.... null to CCS!

regards,

Carlos
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Old 29th June 2007, 02:21 PM   #1957
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Default I also asked my neighboor help to evaluate..the guy is audiophile


and a good friend too...we can go kidding.

When he knew i was using CCS (more modern=better) he fast detected the amplifier was playing with CCS (watching cables..ahahaha!) and said the CCS one is more "fluid"

I said that fluid was leaking from his brain, probably melted.

He finally said the standard sonics (resistance into long tail as load) was better...but was a blind CCS with different musics...he could not detect anything more.

My treble reforcement capacitor, that one in parallel with R10 (because my speakers are mufled, also environment, also old ears) was removed....also i had to include a resistance into the VAS emitter, as CCS voltage is bigger than the 600 milivolts i have using resistances....the emitter resistance hold some milivolts and the transistor operated in the same point (614 milivolts from base to emitter)

regards,

Carlos
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Old 29th June 2007, 02:27 PM   #1958
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Default Input capacitor is still beeing used...as there are some signals


not entirelly filtered from CD output...those ones can enter the amplifier...and Dx amplifier can amplify 100 Megahertz (this is not good) and be disturbed.

Capacitor is there.... sometimes it can help.

regards,

Carlos
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Old 29th June 2007, 02:29 PM   #1959
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Default My input capacitor is customised to my own needs


I have perceived too much bass in my home.

In friends home the sound was flat...no problems.

My home, my speaker, my ears may be the problem.

So...i have tried reduced values to reduce low end level.

regards,

Carlos
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Old 29th June 2007, 02:30 PM   #1960
Hartono is offline Hartono  Indonesia
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X7R for input low pass ?
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