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Can we expect JBL LSR305 First-Generation to have very similar measurements?

This sounds like something we see in super best audio friends forum. They stick with subjective methods claiming that it is not possible to establish a reference.

Here is another post about the recent schiit blind test event. It does not tell anything with any rigor.

As I recall, the overall idea of the post was that it is very hard to differentiate those amps. Getting them right just once does not mean much.

This is interesting. Seems to confirm what @amirm says.

In THD+N vs. frequency plot only one output level is used. So, I guess, someone can argue that the THD+N vs. frequency curve will be completely different for a different output level etc.

Most published measurements including the ones from @amirm have the following measurements in most cases. FFT @ 1kHz sine Frequency response THD+N vs power plot @ 1kHz SMPTE or CCIF plot Output and input impedance Let’s say there is a device that measures very well below the hearing thresholds...

Video channels are dominated by subjective reviewers. We need objective reviewers in video channels!

Why no one has done a youtube video on these amps yet!

With my question I was referring to commonly published measurements (like this or this) of individual devices by manufacturers or independent people like @amirm. Can those measurements accurately predict the performance of the given device when it is connected with other devices with real music...

Many subjectivists argue that measurements can not capture the audio quality of an AMP or a DAC. We can accept that there are lot of variables that come into play when measuring a device. Input level, input signal (1kHz sine/CCIF tones/SMPTE tones etc), gain/output level, load resistance are...

If you don't hear a difference with with HD 58X you wont hear a difference with HD 650 when the volume is matched assuming both HD58X and HD 650 have the same resolution capabilities don’t you think?

This may help when reading graphs. This tool allows you to give two variables you know from {V, I, R, P} and calculate the rest.

Exactly. Adding to that inter modulation distortions, multi tone distortions and distortions at different frequencies and power levels. Cross talk. Has @amirm or anyone measured the audio performance of day to day devices like iPhones and Macbooks? They will be a very good baseline for many...

@amirm do you think the same? If this is the case, many people even in the budget gear range are wasting money for no reason!

Will there be an audible difference between listening through iPhone headphone jack and using something like Heresy + modi? Let’s say power is not a concern. If there is a difference what would the difference look like?

We do not have IMD and multi tone tests for these two amps to see how they perform when more than one tone is fed in. I think IMD and multi tone tests are very important to simulate something at least close to music and see how the gear perform.

Following is from the listening tests. Here @amirm said that two amps are identical in sound in a quick comparison but he said he might see differences if listened more carefully. This means they can sound different being so close in measurements around -110dB levels! How come?

If both are fantastic what could be the bad decision?

Does this mean something special?