Achieving low distortion in audio amps

[Phil Allison]

" Graham Stevenson ADHD Fucked Pommy Pig "

Funny how a tiny few audiophool fucking idiots said ,with no proof
whatever, they sounded better (??) when they started > fitting faster
Japanese output devices then isn't it ?

** Nope.




....... Phil

 

[[email protected]]

Phil Allison wrote:

<snip>

I wonder why Phil thinks that posting a confirmation that he still
thinks that he is right - and absolutely nothing more - is a useful
addition to the debate.

 

[Clifford Heath]

Most modern amps have slew rates that make the issue almost academic.
I haven't designed one in recent times that didn't have a full power bandwidth
of at least 45kHz.

Most of us haven't, either

 

[Eeyore]

Phil Allison wrote:

<snip>

I wonder why Phil thinks that posting a confirmation that he still
thinks that he is right - and absolutely nothing more - is a useful
addition to the debate.

You're looking for some logic in his actions ?

Graham

 

[Chris Carlen]

<[email protected]


** Make no presumptions.

Make only good ones.




** Thankyou.

Even I know that to be not sufficient. As I was just explaining the
shape of the class-B push pull waveform to my wife the other night, we
agreed that it would be a 1.2-1.4V dead band. She is a physicist with
research experience in exotic semiconductor junctions. My kind of girl!

** Another completely wild presumption.

The Quad 405 et alia actually work as advertised.

Autistic, fucking idiots never learn - do they ?

No, they just degenerate into childish, uncivil, and vulgar name calling
and obscenity shouting when put in their place.




--
Good day!

________________________________________
Christopher R. Carlen
Principal Laser&Electronics Technologist
Sandia National Laboratories CA USA
[email protected]
NOTE, delete texts: "RemoveThis" and
"BOGUS" from email address to reply.

 

[Ian Bell]

What is the view on the fellows assertion that NFB is bad? Even if the
THD harmonics are not distributed evenly, what difference does it make
if the amp still acheives 0.02% or something like that?

Comments appreciated.

Check out the work of Douglas Self. He has actauly investigated this
systematically.

Ian

 

[Chris Carlen]

Check out the work of Douglas Self. He has actauly investigated this
systematically.

Ian

I have his site bookmarked. Thanks.



--
Good day!

________________________________________
Christopher R. Carlen
Principal Laser&Electronics Technologist
Sandia National Laboratories CA USA
[email protected]
NOTE, delete texts: "RemoveThis" and
"BOGUS" from email address to reply.

 

[Jim Thompson]

Check out the work of Douglas Self. He has actauly investigated this
systematically.

Ian

But a quick peek shows he has some audio bias of his own... his
comments about "switching" from "A" to "AB" are as nonsensical as the
need for Monster Cable.

...Jim Thompson

 

[[email protected]]

Does he indeed.

Do you have a link ?

Graham

I've only read his papers. Probably the IEEE solid state circuits as I
don't read the AES journal very often.

 

[[email protected]]

Hardly arguable. It's clear as day !


Most modern amps have slew rates that make the issue almost academic.

I haven't designed one in recent times that didn't have a full power bandwidth
of at least 45kHz.

Graham

Yes, but not everyone was putting passive filtering in front of their
amplifiers. In some situations, AM BCB was entering. Granted the amp
was not attempting to reproduce them at full power, but the higher
frequency is an issue regarding slewing.

 

[Phil Allison]

"Chris Carlen"

Phil Allison wrote:

Even I know that to be not sufficient.

** You know no such damn thing.

As I was just explaining the shape of the class-B push pull waveform to my
wife the other night, we agreed that it would be a 1.2-1.4V dead band.

** ROTFLMAO !!!!

This posturing ass and his dumb bitch agreed - sooo THAT makes it so
!!!!

LOL !!!

She is a physicist with research experience in exotic semiconductor
junctions. My kind of girl!

** Shame the dopey cow has no clue whatever about real world electronic
circuits.

Let alone about the Quad amps.

No, they just degenerate into childish, uncivil, and vulgar name calling
and obscenity shouting when put in their place.

** You are a nothing but a FUCKING MORON - Carlen.

The Quad current dumping " amps all work exactly as advertised - see if
you can figure out where your DUMB as Dog Shit error is.

I give you a hint:

In the term "zero bias" what quantity is zero ??????




......... Phil

 

[Eeyore]

Check out the work of Douglas Self. He has actauly investigated this
systematically.

Doug Self is a great 'self-publicist' ! You don't have to believe everything he
says btw.

Graham

 

[Zak]

Now I discover that the amp runs very hot when doing nothing. I
recorded temperatures on the top cover over the centrally placed
heatsinks of about 47C when the front panel power button was off, and up
to 52C when operating (but not producing any meaningful output power, so
basically idling).

Keeping the thing powered up when off, especially when it uses that much
power, sounds like audiofoolery to me. I would not want to own it for
the energy bill alone.


Thomas