Amplifier sound quality test - method and samples 2015-03-20 17:17:46 I present a method for testing amplifiers, which let you compare original sound samples to different amplifiers by comparing test sample files. This allows for doing the listening evaluation on any equipment, anytime, anywhere, and you can use abx to verify. I am not a regular reader on Hydrogenaudio, so please forgive my ignorance if something very similar to this has already been discussed. I just wanted to present this to an audience that are familiar with and have an actual interest in listening test evaluation, and also tries to have a scientific approach and the knowledge for it. I had hoped to be able to verify sonic differences in power amplifiers, the intention was not to present yet another "all sounds the same". So far, I have failed to find any audible differences between original sound samples and amplifiers, when playing music signals. I found audible differences between original and also between amplifiers using multitone test signals. But that's not what we listen to, is it?I describe the method, what I tested for and my findings and conclusions so far here: Article: http://kvalsvoll.blogspot.no/2015/03/testi...nd-quality.htmlTest sample files: http://www.kvalsvoll.com/Articles/abx/I have only posted this on data-bass and a local hifi-forum. I expected some interest on the hifi-forum, considering the energy they put into discussions about cables and other snakeoil, but there is little or no interest. Actually I don't think they understand the test method and the implications of the results. So it is no surprise that so far: - The method has not been challenged- No reports received from positive tests that have been able to verify differencesNote the 5x loop through the instrumentation test - since the loop contain a consumer av-receiver, and this indicates that it is completely audibly transparent, many audiophiles could save a lot of money and potentially get improved sound at the same time. Just saying, though I suspect very few are listening. It would be interesting to see what you make out of the sample files - can you verify differences that I myself fail to notice, do you see obvious flaws or shortcomings to the method? And if the test sample files can entertain some of you through the weekend, I personally find this experiment a success regardless of what conclusions comes out of it.