If I understand the test proposed correctly, it certainly could be done technically.
The problem with it would be the same as is the problem when humans do a comparison, attributing differences to cause.
There would undoubtedly be differences at least to some small degree.
It would not be valid to assume the only thing that is different is the fuse since the performance of any system at two different times is bound to vary to some degree for various reasons.
If controlled properly, the results would indicate the magnitude of difference that the fuse alone could possibly produce, but there is no way to assure that. If tested repeatedly and that magnitude was repeatedly large and consistently measurable, that would support the notion that a fuse change can make a major difference. Otherwise not.
Furthermore, assuming a significant difference is detected, the next task would be to determine in what ways and how that would be heard. Determining which sounds in fact "better" would be a further challenge.
But at least there would be some actual technical data to base a claim on rather than just the individual opinions and observations of a few.
Then you still have the issue of if the change observed in one system occurs similarly in others. Most likely not, so the results are really only useful for the actual cases tested.
The problem with it would be the same as is the problem when humans do a comparison, attributing differences to cause.
There would undoubtedly be differences at least to some small degree.
It would not be valid to assume the only thing that is different is the fuse since the performance of any system at two different times is bound to vary to some degree for various reasons.
If controlled properly, the results would indicate the magnitude of difference that the fuse alone could possibly produce, but there is no way to assure that. If tested repeatedly and that magnitude was repeatedly large and consistently measurable, that would support the notion that a fuse change can make a major difference. Otherwise not.
Furthermore, assuming a significant difference is detected, the next task would be to determine in what ways and how that would be heard. Determining which sounds in fact "better" would be a further challenge.
But at least there would be some actual technical data to base a claim on rather than just the individual opinions and observations of a few.
Then you still have the issue of if the change observed in one system occurs similarly in others. Most likely not, so the results are really only useful for the actual cases tested.