[Audio_Empire[_2_]]

On Thursday, December 20, 2012 6:46:30 PM UTC-8, wrote:
On Thursday, December 20, 2012 6:37:24 PM UTC-5, Audio_Empire wrote:



I still believe that the only way to do a DBT/ABX of something as

subtly different as amplifiers should be done with each amp being

auditioned for as much as a half hour before switching to the other

amp. Use the same cuts from test CDs for each session, played in

the same order. Of course careful level matching and strict double

blindness must still be maintained. I suspect that such a test might

uncover differences that short term, instantaneous switching doesn't

reveal.



As long as I've been reading RAHE (which is going on 15 years, I think), I've seen this belief expressed. One of these believers ought to try it sometime. Perhaps they will teach the world of psychoacoustics something. (I am not holding my breath.)



bob

I have tried it. And if there are any differences, one has a much better
chance of uncovering them if one really listens to the devices being
auditioned. You can't do that when two devices are being swapped
out for each other every few seconds (or even every couple of minutes).
As long as the auditions are truly double-blind, and the levels are carefully
matched to less than a dB, and the same varied demonstration material is
used in each instance, they are still true DBTs.