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In Reply to: RE: canned goods posted by neolith on January 17, 2017 at 06:52:49
I am guessing that the resistor is used to compensate for lower DC R of the new coil vs. OEM, but can't tell for sure where it is wired.
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Perhaps you are right but to me it makes no sense to spend money on a fancy inductor with lower DCR only to add the resistance back. It would be better to recalculate a new inductor value to come up with the same fc.
I married the perfect woman. The downside is everything that goes wrong is my fault.
With you on that, but some folks insist on using OEM values with their new parts.
The whole concept of that makes zero sense. :)
You start with a passive crossover with component values identified and you finish with another passive crossover with the same component values.........except your wallet is much lighter. And the only thing you have possibly justifying that expense is a subjective evaluation.
Eye rolling time again. :)
Dave.
It is true that you can't measure subjective qualities of crossover component changes, you can still hear differences derived from those changes.
No, that is not (necessarily) true.
Subjective evaluation is notoriously open to false conclusions. Many people have heard differences derived from no changes at all. :)
Or vice versa, where objective measurable changes have been made and no subjective difference could be heard.
Dave.
That is the sole and unique goal of the hobby. Why rail against it.
The "sole and unique goal?" You're kidding, right??Subjective evaluation is only the final (small) piece of a design objective that produces all these various products. Your statement is equivalent to putting the cart before the horse.
Dave.
Edits: 01/17/17
You already have a well designed crossover and not redesigning it so yes, Sole and unique goal. The measurements and concepts of technical perfection are only important as the path to getting to desired subjective performance.
That might be YOUR "sole and unique goal." As long as you're only speaking for yourself, I don't have a problem with it. But don't be ascribing your evaluation acumen to me....or anybody else.
BTW, a true subjectivist would say "the measurements and concepts of technical perfection" are irrelevant.
You're going to twist yourself into a pretzel on this. Be careful.
Dave.
My work ToDo list has grown so long I may never get around to experimenting with crossover components on my 1.7s. If I were going to experiment I would prefer to know in advance how to measure an audible difference for example lower distortion or a smoother frequency response curve in REW. If it is possible to measure an audible change and I lack the tools to measure I can still hear the audible change I just can't prove I heard it. So my assertion that an audible change occurred would be objective even if false because it can be proven or disproven by someone with the appropriate tools.
I found a couple of relevant articles that suggest changing components may be audible in some cases but they don't provide any before and after tests:
http://www.audioholics.com/loudspeaker-design/loudspeaker-myths-and-truths/loudspeaker-myths-crossovers-bracing-drivers-oh-my
http://www.audioholics.com/loudspeaker-design/crossovers/identifying-legitimately-high-fidelity-loudspeakers-crossover-coils-capacitors
Perhaps understood by all but: the statement that coating my speaker cables with mustard smooths the frequency response of mid base is objective because it can be proven false. The statement that coating my speaker cables with mustard induces inner harmony is subjective because it cannot be proven or disproven.
On the other hand I may not know what I am doing with REW :|.
You need more mustard on your pretzels. :)
I'm not sure why folks are intent on blending the line between subjective and objective evaluations. It's black and white. There's is no gray area with regard to discussion on one of those evaluations.
This particular case is an interesting one because we're making the assumption that the crossover was duplicated exactly....component value wise. But, supposedly subjectively superior components were substituted. However, there must be the possibility said components might deteriorate the subjective performance???? :)
Cheers,
Dave.
I married the perfect woman. The downside is everything that goes wrong is my fault.
I've got some better wheels for that cart; exact same circumference and mass, but they roll better...
I married the perfect woman. The downside is everything that goes wrong is my fault.
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