Btw Joe, you have not cancelled out the output impedance of the amp with a device placed across the terminals. The best you can do is make the load the amp sees resistive through the band.
The LCR you put across the terminals on the woofer side does not change in any way the currents in the woof voice coils. The woofs see nothing different with those in place or removed. If your amp is bad enough that it changes it's response when they are added, you should fix your amp.
Same with the zobel on the tweet line. If that is to suppress oscillation as a result of a low z cable with high capacitance, it's great. But again, if the amp reacts to it, you need a better amp.
But thanks for the look see into your stuff.
Jn
Ah, so you are loading down a tube amp. That explains a lot, you are trying to compensate for a 3 ohm output z. And, your methodology does not work properly for an amp with low z.
I don't recall you mentioning that tidbit before.
The LCR you put across the terminals on the woofer side does not change in any way the currents in the woof voice coils. The woofs see nothing different with those in place or removed. If your amp is bad enough that it changes it's response when they are added, you should fix your amp.
Same with the zobel on the tweet line. If that is to suppress oscillation as a result of a low z cable with high capacitance, it's great. But again, if the amp reacts to it, you need a better amp.
But thanks for the look see into your stuff.
Jn
Ah, so you are loading down a tube amp. That explains a lot, you are trying to compensate for a 3 ohm output z. And, your methodology does not work properly for an amp with low z.
I don't recall you mentioning that tidbit before.
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NO!
Now you guys are becoming really nasty.
Now you guys are trolling me, and I am nobody's victim, never felt a martyr, so you guys can't troll me. But the fact that you are now, you are showing your true colours and should take a really good look at yourself.
The reason you can't troll me is that you are a minority!
Bet you didn't think about that. 😀😀😀
Anyway, I will leave you trolls alone for a while.
Tony, come around sometime. I am an extremely gracious and humble host. You nor anybody welcome to come around here will not be attacked and will definitely not be trolled.
You guys, try to have a nice day, smile because Sydney is sunny, warm and inviting today.
Tony, come around sometime. I am an extremely gracious and humble host. You nor anybody welcome to come around here will not be attacked and will definitely not be trolled.
You guys, try to have a nice day, smile because Sydney is sunny, warm and inviting today.
Which explains a lot, you do realize a voltage source has 0 Ohms output impedance? You could explain what you are doing without all the misconceptions, it has little to do with distortion.
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Are you talking about all the voices in your head? 😀 Sorry, couldn't help it, you could be considered to be being passive aggressive you know......🙄
What the F happened there? Scott didn't say that!!
Go back through all your posts to me. You did nothing but attack me, question my motives, and use conspiracy theories. That has been your first line of defense. When I called you on your tactics, you posted ONCE civilly to me.
Then, you returned to your Schtick.
As I said, your ability to write technically is not good at all. Either learn this stuff, or hire an interpreter (aka a technical writer).
Don't blame others for your inability to post and respond civilly. You tried your garbage with me, look at where that has gotten you.
Some here understand what you are doing far better than you, so don't p##s on them. Discuss civilly, don't assume disagreement or criticism is an attack on you personally.
Jn
Well, yes, I live in Australia......It is nothing like this thread ha ha.
People have said to our son that 9 of the world's 10 most venomous creatures live in Australia. He's a doctoral student in marine biology and has great delight in telling them that actually 9 of the 9 most venomous creatures live in Oz.
And, NO, I don't want to get in a discussion of which species make up the actual list.....I'm just the messenger.
Cheers Jonathan
People have said to our son that 9 of the world's 10 most venomous creatures live in Australia. He's a doctoral student in marine biology and has great delight in telling them that actually 9 of the 9 most venomous creatures live in Oz.
And, NO, I don't want to get in a discussion of which species make up the actual list.....I'm just the messenger.
Cheers Jonathan
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Is that a Royal 'we'? I'm not convinced. Military, space and telco to name but 3 are banging on the table demanding better D/A performance, but for audio we are below brownian motion levels already. Yes it would be nice if someone made a £300 DAC with the performance of a £3000 unit for audio (to my cloth ears they already do) but there are some big barriers to that.
1. Why give up on a huge profit margin
2. A lot of people and esp reviewers judge sound quality off selling price.
3. they might get lynched by the vendors of the £3000 units.
So in the commercial arena there is no driver. For DIY we can do what we like and people do.
Many times before! Sigh.
But thanks for your 'thanks' and being a little respectful can work.
I hope you don't mind that I don't agree with your assertion that it makes no difference to the driver current, not in the way that you reason. It has to do with the back-EMF impedance of the driver. In discussions so far, we have been able to establish some interesting things. If I mention what they are, I will just be in for another barrage. It comes down to thinking less in terms of voltage and defining what is an impedance is (can you have more than one kind of impedance in a loudspeaker driver - or is that too dangerous to ask?).
Where have I forced others to agree with me 100%? I have not. That is not my style. I don't want claims and anti-claims, I want ideas and varied opinions, get stimulated by new input. I want discussions, not fighting.
I have just come back from Europe because I wanted to see a bunch of people and talk to them. I wanted to get their reaction and in the process of explaining things to others, it helped me to see more clearly and tested my way of thinking. If they ask questions, I don't ignore them because they are actually trying to help me and even adding to the subject, because I know they too are questioning that status quo - the power of the voltage model. But the spirit of these discussions have been really good.
That back-EMF impedance I have mentioned is at the heart of it, it is not something I dare talk to freely about here, but I can with them, because the discussion is based on respect. Why can't we have that here? I just wish we could and it is frustrating that we have free speech silenced by the usual suspects, the ones John Curl refers to. We all know who they are.
But to respond to the question, and I recognise the question is a fair one, "does not change in any way the currents in the woof voice coils" may prove to be related to the back-EMF impedance in an intriguing way. Trust me, it will be tested, it will be discussed and wherever the chips may fall, so be it. But does that make the subject taboo?
Let me ask, in a current send situation, well, ask the same question as you have, but in that context. Do you see something? Here the output impedance affects the current phase angle in a major way. The current is constant. Why not make it constant with voltage drive? I am speaking of the current of the amplifier. The driver will now see a different current phase angle. What is the result of this known change? Please, don't be to quick and dismissive. What changes the current phase angle of the driver? Not the Re part of the impedance, it is indeed resistive. But the rest of the impedance is not. Edit: There is a non-static property here that needs to be accounted for. Your question is purely static.
Your question was fair, and the question I just posed is fair too.
Oh dear, I really must not get carried away, I have work to do...
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Sure, there are similarities at some level. What you said that I responded to seemed to be pointing out differences more than similarities.
In audio engineering Scott Wurcer has said multiple times, IIRC, that there is nothing new, its all been done before. Also, JC can't really consult around the world talking to be best, since they are his competitors. They keep their secrets from each other. In addition, solo designers like JC have a home lab with whatever old equipment they have been able to cobble together over the years. There are no grants, no teams, no helpers, no machinists to make things for you. In short, while there are some similarities, there are also many differences.
We know you are a very smart and well educated guy. If you feel motivated at some level to think up a list to make a case your work is like JC's, of course you can do it. If tomorrow you are motivated to make a list showing the opposite, I think all of us here expect you can do it.
At any rate, it is probably unreasonable to expect JC to say too much about how he designs amplifiers here, since that is the only thing he has with which to provide a small income. His work is not that kind that comes with retirement plans and other benefits.
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Sorry but I have to...
JN wrote: "The LCR you put across the terminals on the woofer side does not change in any way the currents in the woof voice coils."
You refer to it as if it was a question i.e. "But to respond to the question, and I recognise the question is a fair one, "does not change in any way the currents in the woof voice coils" - it wasn't a question.
Please try to sort out what is affirmations and what is questions - but like Bohr you don't do affirmations, only questions. (just repeating your words - don't blame me)
//
JN wrote: "The LCR you put across the terminals on the woofer side does not change in any way the currents in the woof voice coils."
You refer to it as if it was a question i.e. "But to respond to the question, and I recognise the question is a fair one, "does not change in any way the currents in the woof voice coils" - it wasn't a question.
Please try to sort out what is affirmations and what is questions - but like Bohr you don't do affirmations, only questions. (just repeating your words - don't blame me)
//
I respectfully disagree. Jürg Jecklin, inventor of the Jecklin Float earspeakers and the Jecklin disc, once said to me: "If you can't build it in your kitchen, then it's s**t".
Ideas are the most important ingredients; some of them require BIG $$$ to materialize, but not all. A kitchen, or a garage, is fine for the latter.
You do know that 0402 surface mount devices are the electronics industry standard? They are, oh what is the best word, awkward, to assemble in the kitchen of a residential home. At least that's my opinion. What's yours, Mr/Ms Zung?
Awkward, but not impossible.
And you can always use 0603 instead which is pretty easy even for my almost-retirement age.
Patrick
And you can always use 0603 instead which is pretty easy even for my almost-retirement age.
Patrick
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