Originally Posted by Nightlord
LTS-the "sound-technological society" here in Sweden have been using a Before-After blindtest for quite many years now for this. And while this is quite the magnifying glass for differences, it's so far been quite hard to find anything that doesn't alter the input in a hearable way. Though one can argue that in normal conditions those amps only having minor flaws may not be distinguishable. But saying that no differances exist within operating range has been debunked here for quite some time. Personally I would pick anything tested by them with only small flaws without hesitation. (Best so far is a Bryston - after Bryston changed their circuits following the initial test/feedback from LTS. Very nice with a manufacturer who takes the time to listen to feedback!)
As someone just post, I seem to be the only one who cares about fresh and innovative tests of amplifiers as done by LTS. You would think that there would be value in knowing if an amp colors its input. But no. Why? Because it kicks the door open ever so slightly that other audiophile views may be right, causing some to get nervous and try to dismiss it anyway they can. Here are the relevant discussions so that we don't repeat them:
Note one of the first replies from Arny: "The problem is that all of the evaluations appear to have been sighted. That makes them more like a public opinion survey than an actual audible fact."
So blind testing by a respected organization is considered a public opinion survey. Arny used to go on and on about a Dolby listening tests regarding jitter. One problem: it was a sighted test! Here is that post: http://www.avsforum.com/t/1425262/are-audio-companies-all-involved-in-a-huge-conspiracy/870#post_22508179
. Now this test is not blind enough for them where a sighted one was good enough since it had the outcome he wanted.
As to why I like it, I first heard about LTS and its amplifier tests back in 2009. A forum member from your neck of the woods while claiming there were no differences in such gear, let it slip inadvertently that there are tests that show differences. It took days and many posts to get him to provide these three letters: LTS. He would not say more or give any link to their web site. As you can imagine, those three letters were not enough to find the info since the web site is in Swedish. But I persevered and after a few days of searching, I found their web site. Machine translation at that time was pretty ugly affair but despite that, I could see incredible passion around objectively evaluating audio gear. The web site went on and on about how bias-prone sighted evaluation was and importance of controlled tests through blind testing. I found interviews by Ing, this time in English, where he praised the work of people like Dr. Toole and again, how important it was to be unbiased. No one reading the background of the organization would remotely come across thinking they are on the subjectivist side of the fence. They are squarely in the camp of trying to get to the bottom of "audio truth."
Fascinated, I contacted Pekka Johansson, the editor of "Music and Sound Technology" to see if I could learn more with the aim of publishing an article on their testing in the Widescreen Review magazine. Alas, after a quick and warm reply back form him, the connection got lost and that was that. Worse yet, they revamped their web site completely and none of the original editorials and articles as I described is there. And I cannot find Ing's English interview either. It is a shame as it leads to the type of mischaracterization of who they are by the members here who don't like the result of their work.
It was a pleasure reading your posts on this topic. It added some necessary "color" to my readings of the work. And bring some credit where it is due for LTS.
BTW, I read in one of Ing's forum posts (did I say I spend days reading those threads through machine translation?), he said that there have been more than one amp that has passed the transparency test. To my surprise one of them was a Tube amp! Here is the machine translation of that forum post:"Bryston amplifier belongs to a very small group (can not remember if they are one or two more) as int has been detected in a F / E-listening.
One of the most transparent amplifier (thus giving low detectability in F / E-listening) that I encountered during my early experiments with F/E-listening (in the 70's) was an Audio Research, with very many tubes in!
It took many years before I encountered any transistor-equipped for amplifier as (dummy load nota bene) did the same. Though without a load so There are many transistor amplifiers that are difficult to detaktera in F/E-listening. "
I am so fascinated by this test that have made it one of my retirement projects (
), to recreate it! Thanks again for chiming in. I won't have to reference my own posts anymore when someone challenges the test in the future