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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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Propeller Head Plaza Technical and scientific discussion of amps, cables and other topics. |
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In Reply to: Sounds like a reasonable approach. posted by Commuteman on January 12, 2004 at 17:32:05:
has anyone tried it?I'm sure someone probably has at some time. But I can't think of any specific instance. Though see my remarks about Bruno Putzeys at the end of this post.
Perhaps a simple refinement (or maybe it's what you meant):
If the cables are connected in an active (powered up) system, then the effects of amp output damping and the speaker load will be correctly measured.
Basically, yes. Mostly what I meant was doing something more realworld than smacking and flicking cables.
Wait... I guess you would have to isolate the loudspeaker from the sound impacting on the cable, since it will act as its own generator.
You could add a pair of unconnected binding posts to the speaker if you wanted to include any effects of the enclosure's vibration on the cable.
Perhaps in this case a simple dummy load to approximate the speaker would be better.
Yes.
But I'd probably start off with interconnects seeing as the source and load impedances are typically much higher than a loudspeaker scenario which would emphasize the effect making it a bit easier to measure.
Use an interconnect and terminate one end with say 1k (not uncommon with tube output stages) and the other end with 100k (not uncommon with tube input stages).
Or you could up the impedances by say a factor of 10 and keep their ratios the same. Which would help even more and then you could scale the results to get a better picture of what it would be with the more realworld loads.
By the way, Bruno Putzeys is planning on exploring these mechanical aspects of cables (seeing as he wasn't able to turn up anything with regard to harmonic and phase distortion).
Last time I asked him about this he said he was still working on a special buffer circuit he wanted to use in the process of doing the measurements. He's back from the holidays now so I'll see if he's made any progress yet along those lines.
se
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Follow Ups
- Re: Sounds like a reasonable approach. - Steve Eddy 17:55:59 01/12/04 (0)
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