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 millwood 25th April 2004 11:24 AM

Quote:
 Originally posted by JensRasmussen Does anyone know this – did anyone do sensitivity calculations comparing the two scenarios? Linear vs. Nonlinear loading of the amp?
I answered this earlier but my post was deleted by a moderator. I don't think a non-linear system is foundamentally different from a linear system as far as emf is concerned. any non-linear system will approach a linear system when delta is small enough.

Quote:
 Originally posted by JensRasmussen Steve – what’s the graph legend on the graph? – thanks \Jens

I asked the same question of Graham as well.

 JensRasmussen 25th April 2004 11:46 AM

Quote:
 Originally posted by millwood Any non-linear system will approach a linear system when delta is small enough.
I agree of cause, but since speakers rarely are subjected to voltage levels that small (A least at my place :) ) I'm interested in what happens at higher levels.

\Jens

 millwood 25th April 2004 12:18 PM

Quote:
 Originally posted by JensRasmussen I agree of cause, but since speakers rarely are subjected to voltage levels that small (A least at my place :) ) I'm interested in what happens at higher levels. \Jens

I don't have an answer. the TS model is a small signal model so I am not sure of its applicability to non-linear situations. However, it is conceivable to retain the form of the TS model but use use non-linear values for the R, L and C to simulate a non-linear speaker. However, that can be highly complicated. and I doubt it will foundamentally enhance our understanding of speaker EMF.

 Fred Dieckmann 26th April 2004 07:47 PM

What you talkin' bout Willis, or Those Delta Blues

2 Attachment(s)
"Any non-linear system will approach a linear system when delta is small enough."

Delta what? What about a system that becomes more non linear as levels decrease?

I will give it an 85 out of a hundred on the pomposity scale, where 100
is defined by laying on the floor laughing till tears come out of your eyes. In all fairness though, I have seen Jocko reach the 90 mark in reading some of the post on the DIY forum.

Jocko and I once achieved 95 on the similar " ludicrous and offensive" scale by sitting on the floor and laughing till tears flowed during John Water's "Pink Flamingos' at the local Cult Films movie theater. I believe that 100 on this scale is represented by wetting one's pants. 85 is represented by material which causes one to exhale soft drinks through your nose if drinking when encountering said material.

 SY 26th April 2004 07:50 PM

Pink Flamingos

A little OT, sorry. OK, a lot OT.

Fred, I once had my hand autographed by Mink Stole. That remains my most-cherished celebrity encounter. I hear rumors that you're actually Edith Massey's love child. True? Do you like eggs?

 JensRasmussen 26th April 2004 07:56 PM

Fred what's your point - if you have any?

\Jens

 millwood 26th April 2004 09:33 PM

Re: What you talkin' bout Willis, or Those Delta Blues

Quote:
 Originally posted by Fred Dieckmann "Any non-linear system will approach a linear system when delta is small enough." Delta what? What about a system that becomes more non linear as levels decrease?
"levels"? What levels?

 Fred Dieckmann 27th April 2004 05:39 PM

There always be eggs ........

"I hear rumors that you're actually Edith Massey's love child."

I'm jealous about the Mink Stole encounter. I once sent a birthday card (to my wife as I recall) with Ms. Massey wearing a leather outfit with X crossed ties securing a 3 inch gap down each side. She had to be at least 60 and her cellulite poked out about 1/2 an inch through the openings between the ties. It was wonderful! I believe Jocko sat on the floor laughing when he saw that one also.

My point was that many systems become more non linear as input levels decrease. An example would be a D to A converter. If one is going to talk about such things, know what you are talking about beyond buzzword_bs. Technobabble without real content is my favorite target and it is usually pretty obvious when someone is doing it.

 JensRasmussen 27th April 2004 08:59 PM

Hi Fred,

Does this mean that a sampled system is linear if the input is large enough - how big must the input be, in order for the system to be linear?

:)

\Jens

 millwood 28th April 2004 12:51 AM

Re: There always be eggs ........

Quote:
 Originally posted by Fred Dieckmann If one is going to talk about such things, know what you are talking about beyond buzzword_bs. Technobabble without real content is my favorite target and it is usually pretty obvious when someone is doing it.
I wish you were around when that guy was presenting that famous lm317 circuit that was captured in a unique way, :)

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