Why is Double Blind Testing Controversial?


I noticed that the concept of "double blind testing" of cables is a controversial topic. Why? A/B switching seems like the only definitive way of determining how one cable compares to another, or any other component such as speakers, for example. While A/B testing (and particularly double blind testing, where you don't know which cable is A or B) does not show the long term listenability of a cable or other component, it does show the specific and immediate differences between the two. It shows the differences, if at all, how slight they are, how important, etc. It seems obvious that without knowing which cable you are listening to, you eliminate bias and preconceived notions as well. So, why is this a controversial notion?
moto_man

Showing 1 response by cpdunn99

Blind and double-blind is a way, as we all know, to attempt to remove the subjectivity from what is hoped to be an objective evaluation. It's great for testing some things in which there is a clear hierarchy of "poor" to "excellent." Eyes, ears, and taste buds, however, don't conform to objectivity. Try a blind wine-tasting to see how many diverse opinions are being swished around the tongue and spat out into the bucket.

I tried a blind (but not deaf!) test last night, as it so happens, of some Vampire vs. Nordost vs. van den Hul interconnects.

It's REALLY hard to change cables with one's eyes shut! I knocked my turntable onto the floor, stepped onto the open try of my CD player, connected the phono stage to the tape deck, smashed my 180gm Dylan LP, and shoved my index finger through the cone of my Cabasse.

After all that, all the cables sounded like s**t. In truth, the van den Hul bested them all, followed (at some distance) by the other two. The $15 Vampire sounded no different than the $150 Nordost.

Blind testing is fun, as Twl notes, but very difficult to implement in real life.