Originally Posted by craigsub
Great ... and where does someone find this ABX box ? I asked earlier, and got no answer. I have tried searches, and cannot find one. I have never seen one science guy here involved in a test in which amps were swapped out in 2 seconds.
I would love to see a link in which Toole states a DBT in loudspeakers in one's own home is worthless. Care to point out his exact words ?
I am astonished that the science guys here think that sighted speaker tests are preferable to level matched, blind speaker tests. So much for objectivity.
Toole didn't say anything about homes blind testing, period. Why would he? His research concluded the ability to identify speakers by location. In another word, when in a different location, even by a distance of another speaker, that can be identified, hence his development of that in place shuttle that swaps it in 2 seconds. I am sure the 2 seconds is the quickest the equipment turntable can turn without flying the speakers off the table. It certainly would be better if it was less. Acoustic memory is very short for small differences, contrary to popular belief.
So, since you cannot do that in homes, and your idea is to place them side by side, it is obvious that even in a dark room, you will be consistently able to assign characteristics to speakers by location, hence it has no real merit.
I bet the others here say that about sighted testing is that you just cannot do speaker tests properly in the home.
Not sure where you will find that ABX box. I have seen references to them for the new generation of boxes, not the original ones.
You should find your answers in these:
Toole, F. E. ' Listening Tests, Turning Opinions into Facts,' Journal of the Audio Engineering Society, Vol 30, No.6, Jun 1982, pg 431-445.
Toole, F. E. 'Subjective Measurements of Loudspeaker Sound Quality and Listening Preference,' Journal of the Audio Engineering Society, Vol 33, No 1/2, Jan/Feb 1985, pg 2-32.
Toole, F. E. Loudspeaker Measurements and Their Relationship to Listening Preferences,' Part 1, Journal of the Audio Engineering Society, Vol 34, No.4, Apr 1986, pg 227-235; Part two, JAES Vol 34, No.5, May 1986, pg 323-348.
Toole, F. E. 'Listening Tests-Identifying and Controlling the Variables,' Proceedings of the 8th International Conference, AES, May 1990.
Toole, F. E. and Olive, S. E. ' Hearing is Believing vs Believing is Hearing: Blind vs Sighted Listening Tests and Other Interesting Things,' 97th AES Convention, Nov 1994, Print #3894.