There have been a few attempts to progress by trying to show differences between cables can be reliably heard outside of listener bias. The results in each test or trial have all had the same characteristic: randomness.

Progress might be a set of results that do demonstrate something, like cable directionality, can be reliably heard outside of listener bias. ABX testing does have its detractors, the most vocal of which are those with vested financial interests. Russ Andrews is one such detractor. The last link is one test I organised some time ago (although by my own admission it had flaws).

http://chaud7.forum-gratuit.com/viewtopic.php?t=29

Test de câbles secteurs de Kiang, forumeur d'hifigwam.com (en anglais) envoie de câbles masqués aux 23 forumeurs/testeurs :

Présentation du test :

http://www.auricles.com/new_page_41.htm

http://www.hifiwigwam.com/forum1/1614.html

Résultat général : http://www.hifiwigwam.com/forum1/1614-8.html#p113020

Résultats détaillés : http://www.hifiwigwam.com/forum1/1614-19.html#p115713

Résultats : http://www.auricles.com/Kiang_Power_cable_test(2).xls

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Sur le même principe de câbles masqués, écoute en aveugle de trois paires de câble de modulation par Edwood, forumeur d'head-fi le "Blind Cable Taste Test".

http://www6.head-fi.org/forums/showthread.php?t=192802

Test en double aveugle de câbles de modulation (en français) :

http://www.homecinema-fr.com/forum/viewtopic.php?t=29786006&postdays=0&postorder=asc&start=240#168903915

Tests ABX de câbles secteurs (en anglais) :

http://www.hometheaterhifi.com/volume_11_4/feature-article-blind-test-power-cords-12-2004.html

http://mysite.wanadoo-members.co.uk/hificabletest