In Reply to: PCOCC Direction posted by John V on April 12, 2012 at 23:24:38:
Above are two pictures of the surface of UPOCC wire as seen through a USB microscope at around 800x (perhaps a little generous by microscope mfg.) The directionality of the wire is going from the bottom to the top of the picture.
Directionality of solid core wire is due to the micro-abrasions left by the dies the last time it was pulled through. Going with those abrasions, to my ear sounds better than going against them. Going against them reduces high frequency information and soundstage height. This is easiest to hear in the decay of reverberation in a given recording; the wrong way and that reverberation will still be there but it will be stunted. As the highest frequencies travel closest to the surface of the wire this effect is understandable.
If you read through enough of Crump's posts you'll see that he alluded to this and I am sure he would have loved to have a USB microscope to play with.
Until I have a larger sample set and a better scope I still determine directionality by ear primarily and use the microscope as confirmation.
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Follow Ups
- RE: PCOCC Direction - with pictures! - Cpk 09:26:10 04/22/12 (4)
- RE: PCOCC Direction - with pictures! - unclestu 12:56:08 04/23/12 (1)
- RE: PCOCC Direction - with pictures! - Cpk 14:03:20 04/23/12 (0)
- RE: PCOCC Direction - with pictures! - John V 16:03:50 04/22/12 (1)
- RE: PCOCC Direction - with pictures! - Cpk 18:34:52 04/22/12 (0)