bigshot
Headphoneus Supremus
He doesn't say that all the amps have the same power rating.
Looking through the Amp Challenge by Clark ..(first page). In his testing criteria he uses EQ to match the frequency response of the amps he tests. But wouldn't that invalidate his test results? Correcting deficiencies before the test and then testing the lack of deficiencies ..
What are your thoughts?
He's not trying to make the same point that some others are. Paraphrasing, his position would be more that amps sound the same aside from any frequency response differences (if they exist) and while not being driven into clipping.
Actually, the majority of amps would have a flat response, so there would be no need to EQ.
There are performance differences other than frequency response between different amps (other than output power levels as well), but these seem to have a relatively smaller impact on the sound, such that people that have taken the test could not distinguish between amps with very high probability. That said, the setup is more difficult on the listener (hard to tell differences) than some other blind tests. To give the listener more advantages, one would let the listener switch between amps by their own controls, maybe use some better speakers and room, possibly turn up the volume, and so on. With a different procedure and setup, for example, it might be readily possible to distinguish an amp with significantly higher distortion than another, even if the frequency responses are matched. Null results are always inconclusive on alternate possibilities and explanations; that said, that doesn't mean that we should be treating every possibility seriously, if they are ridiculous.
Anyway, it just seems to show that any differences other than frequency response definitely do not make "night and day" differences, or else people would have been able to pass the test.
If you read this link, http://tom-morrow-land.com/tests/ampchall/index.htm
the listener controls pretty much all the parameters and can, for example, substitute speakers or source. Here is the precis version of the test procedure:
Was having an argument with a buddy over IB and in-wall. He seems to be saying that a speaker mounted flush in a wall is the same thing as an infinite baffle. Is that really true? I thought an IB was a system where the woofers were operating in free air. I don't think placing a speaker flush in a wall does that. Correct me if I'm wrong.
Something like this :