You thought that there were no audible differences between different amplifiers ?

[Tangband]

An interesting recording comparison between different amplifiers using the Kef R3 loudspeaker .
The sound differences between those different amplifiers are surprisingly big .
Can you also here a difference ?

 

[ppataki]

Can you also here a difference ?

Indeed quite noticeable differences!
It sounds like change in the frequency response but I am not sure how much those differences would be visible on the measured FR curve of these amps....

 

[TimW]

The differences are massive and sound like the microphones moved. You can hear the center image shift left and right when they switch between amps. Clearly not a well controlled experiment.

 

[threni]

No notes on the video about how the test was set up - any particular reason to take this seriously?

 

[MAB]

I have no idea what they actually measured, seems like camera and speaker position changes with each cut, but hard to tell since the overall effort is so poorly controlled. I am pretty sure the camera is the mic, I actually listened to this excruciatingly poor test.

I love these random posts of YouTube reviews, with lots of things changing, no scientific methodology, designed to create a difference rather than test for difference. Followed by the uncritical question "Can you hear the difference?" My question to the OP @Tangband , why would you expect these cuts to sound the same when the measurement and the test subject are moving even with the same amp???

 

[MAB]

Also, I suggest a modified title and poll:

 

[kemmler3D]

Sounds like best case they were standing really close to the mic during recording and moved every time. Worst case the mic itself moved.

Either way most of these youtube tests are f***ing stupid to begin with. I'm 95% listening to their mic and their room, any differences between gear would have to be massive to get an accurate sense of them. They basically never even do it with binarual mics, which is almost the only way this makes sense in the first place. Doing this to test amps is just absolutely braindead.

 

[MAB]

Sounds like best case they were standing really close to the mic during recording and moved every time. Worst case the mic itself moved.

Either way most of these youtube tests are f***ing stupid to begin with. I'm 95% listening to their mic and their room, any differences between gear would have to be massive to get an accurate sense of them. They basically never even do it with binarual mics, which is almost the only way this makes sense in the first place. Doing this to test amps is just absolutely braindead.

It's even worse. Each time the amps are swapped, the youtuber moved the speakers. For instance:

And it's not the camera angle, which also changes. The speakers change by more than an inch relative to their silly amp-isolation-board.
The video is best watched with the sound off, you get less distracted by the carnival-barking that way.

 

[dasdoing]

some switches seam to be clean. but even then you can't compare cause the cases are diferent and in the reflection zone.
the video doesn't deserve to be analized here
bye

 

[kemmler3D]

I guess this is a pretty good demonstration of how important speaker placement is, though...

 

[fpitas]

Not sure if serious

 

[Blumlein 88]

Lots of questions. Obviously the camera angle changed with different amps or they moved speakers. Surely they didn't move speakers. If the camera mic was used and they moved the camera well, there is your answer. And did they match levels to compensate for gain differences? One could download the audio and figure that out. After having wasted time on so many piss poor test setups on youtube I'm not inclined to bother. They could have and should have described how they did testing in a couple or three paragraphs. So if they couldn't bother, I'm not going to bother much either. This video is meaningless.

 

[BDWoody]

Not worth the bandwidth.