Audiopax 88 Power Amp

[apassgear]

Interesting link to this Brazilian Amp.

http://www.enjoythemusic.com/magazin...audiopax88.htm

It would be nice to hear some coments on this design.

[Tube_Dude]

Hi Apassgear!

Yes i would like to coment!!!

But where is the schematic??..

Jorge

[bournville]

As far as I can make out it appears to be a SE KT88 amp with the output valve in some kind of new revolutionary triode configuration. However, as soon as they use phrases like "sonic aroma" to describe the output that annoys me for a start!

[Tube_Dude]

Hi bournville!

Sonic aroma=coloration

Jorge

[bournville]

Jorge,

Then why not say coloration? I just dislike the invention of phrases for the sake of some new jargon.

Incidentally, I've got old radio service sheets from the 1930s which talk of coloration to describe audio characteristics - after 70 years isn't it time to move on to something more objective to measure audio quality and fidelity?

[Brett]

Originally posted by bournville
Incidentally, I've got old radio service sheets from the 1930s which talk of coloration to describe audio characteristics - after 70 years isn't it time to move on to something more objective to measure audio quality and fidelity?

Agreed. But what do you suggest using? This is a serious question, one which has interested me for some time.
Standard THD numbers are pretty meaningless.

[Tube_Dude]

Then why not say coloration?

Because that will be to obvious...caling it "sonic aroma",the average audiophile even think that this is a great quality...it can even tell his friends in the local pub...
-Hei!. i have a aromatic amp!...Hehehehheeh

Agreed. But what do you suggest using?

The standard for me is the input output diferencial test!If the output is equal to the input...nothing is aded(even aroma)...nothing is subtracted.

The worst distortion (in my opinion) is the intermodulation distortion...and his sister de EMF induced intermodulation!

Jorge

Ps: Bournville im enjoying to change points of vue with you.

[apassgear]

Originally posted by Tube_Dude
Hi Apassgear!

But where is the schematic??..

Jorge

No schematic since it appears that this circuit is propietary and that they will try to patent protect it. (???)

Originally posted by Tube_Dude


Sonic aroma=coloration

Jorge

Well every amp gear has some sort of distortion. It's generaly accepted that distortion caused by the DHT is the most desiered of all if you have to have one.

[Tube_Dude]

*(Audiopax acknowledges the audible efficacy of cryogenic tube treatments but admits to not having good scientific explanations.

Maybe this explain the aroma issue...

Jorge

PS:as if it wasn't enough the cables break in!

[bournville]

Originally posted by Brett
But what do you suggest using? This is a serious question, one which has interested me for some time.

I agree Brett that the development of objective terms for measuring fidelity that would be universally accepted is nigh-on impossible - I think that I'm just irritated when terms are used with all the aplomb of a second-hand car salesman describing a car as a 'good runner.' There is also the suspicion that, as Tube_Dude says, terms like 'sonic aroma' can be used to bamboozle the innocent.