I often argue about cheese with my Dutch wife - she like Gouda, I like strong Cheddar and very stinky blue cheese (she hates it). But, I've had to temper my love of cheese (the curse of high cholesterol).
She likes rollmop, I do too - after its been in the microwave for about a minute
That's o.k., but you should go to the local farmer(s wife) that makes her own cheese and try some. So you are able to taste the seasons the grass and the air
Ahhh a good cheddar, Tophat 48+ is one of the tastiest I know (but may by far not be the best existing). But (again) I still think 'Gouda is the best' (colored subjective opinion)
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I am not allowed to have Danish Esrom cheese, she complains it smells like sweaty socks. Of course, I disagree!!!
That's o.k., but you should go to the local farmer(s wife) that makes her own cheese and try some. So you are able to taste the seasons the grass and the air
Ahhh a good Danish blue, Castello Danablue is one of the tastiest I know (but may by far not be the best existing). But (again) I still think 'Gouda is the best' (colored subjective opinion)
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Yes it does taste good but it does make for stinky feet.I am not allowed to have Danish Esrom cheese, she complains it smells like sweaty socks. Of course, I disagree!!!
My father informs me that Esrom cheese is not available for sale in the Danish town of Esram.......afaik there is no local store in the town.That's o.k., but you should go to the local farmer(s wife) that makes her own cheese and try some. So you are able to taste the seasons the grass and the air
Ahhh a good Danish blue, Castello Danablue is one of the tastiest I know (but may by far not be the best existing). But (again) I still think 'Gouda is the best' (colored subjective opinion)
Dan.
Glad to help.
Wayback Machine is handy for finding all kinds of stuff....text books, research papers, music etc, etc.
Dan.
No this is simply not true. You have a fundamental misunderstanding of cause and effect. Take a step back from speakers for a second and think active R/L/C filters made with op-amps there are plenty of reactive currents and no problems.
The difference in distortion with a speaker in current vs voltage drive is solely due to the motor in the speaker (the load) it is the cause not the amplifier. Take a (good) capacitor and resistor of equivalent conjugate impedance and connect it to your amplifier there is an equal reactive current of equal degrees the other way, there will be little or no distortion. An easy and simple experiment, you like those I thought. Even easier replace the speaker L with a good air core inductor and observe the difference, also easy and I would have thought anyone would have enough curiosity to try considering the push back on your extraordinary claims.
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He has a right, which he is exercising, to express his opinion. He does not have a right to avoid correction and criticism of that opinion, because we too have a right to express our opinion. What is the point of a 'forum' (i.e. a place for discussion) if discussion is barred?john curl said:
You mean someone should pay us?
Could-you, please, explain this ?
As an hypothesis, and in order to can compare the two systems (curent drive VS Voltage drive) in a similar situation , I took care, in my question to indicate "same power at each frequency" (that is not difficult to do). I should have specified "acoustic power", because everything else, we don't care.
Looking at your answer, it seems to me that you induce than the difference in distortion would be due to the amplifier rather than to the load. But someone will correct me if I go astray, it seems to me that this is not really the case with properly designed amplifiers. In any case, not the case at the level of differences in distortions that some say exist between the two modes.
I think you can find a dead loudspeaker somewhere around here. If not Craig's list.
Yes HES listings leave a bit to be desired. I just buy two or more of everything every so often. As I can recone most low cost loudspeakers for pennies on the dollar, spending $200 for enough to do 40 or so is a decent deal. The catch is their shipping charge is usually flat rate, so buying a single piece ain't a good idea. You can pad the order with other weird items they carry.
They are often out of some parts, but I don't know of any other plain cheap cost source.
I suspect with many low cost loudspeakers the gap is big enough you can just add a second layer.
(I suspect the mystery voice coil is 51 mm. I will let you know, some are coming in soon.)
What i'm trying to do, taking advantage of the chance that we have here to benefit from the expertise of members in many areas (Scott and JNeutron etc. do not blush) is that the candid reader (all of us, or should all be, if we want to keep an open mind)) can have an explanation of the phenomena involved in this sea snake that is the "curent drive" applied to the speakers and reach a conclusion technically supported on the question.
And to be able to recognize the snake oil, if it exists, which would be obtained by distillation of this sea snake. ;-)
After that, we could add the two current discussions, whose subject is close, this "8ohm parallel resistance", and the second coil idea in progress.
And to be able to recognize the snake oil, if it exists, which would be obtained by distillation of this sea snake. ;-)
After that, we could add the two current discussions, whose subject is close, this "8ohm parallel resistance", and the second coil idea in progress.
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Seems to me it is. You missed the current drive discussion back in Dec 2018 where Pavel posted his measurement on a tweeter in John Curl's Blowtorch preamplifier part III post #11647. You may also be interested to visit his web page on the subject Current drive of speakers and speaker distortion.
Indra, according to your second link, it seems to confirm my claim to witch you refer. They print:
"First, harmonic distortion of the amplifier used was tested, in a current mode, voltage mode, at all frequencies and always with 2Vrms at speaker terminals. THD of the amplifier was between 0.001% and 0.006%, depending on driving mode and frequency. Harmonic components had fast decay and all of them were far below speaker distortion."
In my book, it means no noticeable distortion amp side. And that confirm too the Scott's remark and my personal experience at the old time I designed analog active equalizers with RLC components.
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Yes, all true. I thought people remembered I only have high HP cars. And, if it didnt come from the factory that way, i modified it for as much power as it could stand. The loading on bearings etc is very different from a cruiser car.
ZR1, CTS-V, W12 -- 600-700HP is a lot of fun also. Take the upped ZR1... 0-60 MPH IN 3.2 SEC IN FIRST GEAR! Stock gear ratios. Its the G-forces I am after
-RNM
Yes please read carefully, the electrical/mechanical network of the speaker is inherently non-linear so if you drive it with even a "PERFECT" voltage amplifier the current has to be non-linear. I'm beginning to think that if you take V = R*I vs. I = V/R people see a different physics involved, it's not.
I almost missed Joe saying Earl Geddes "doesn't get it". When it come to speakers and acoustics that is so absurd it's ridiculous. This whole amplifiers and reactive current thing is a mess of misconceptions and just plain wrongness.
Will someone do the simple experiment, an equivalent R and ideal L in series and a well designed amp, I don't think so it's paramount to asking for a DBT.
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Then you need the Caterham 7, I once read pushing it scared even the designer.
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