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" I own wonderful measuring speakers "

Hi and of course what you say it is a fact, especially for tube equipment
There are some that on the bench perform in a weird way and then they sound very very good ... so in the end they are good.
My point was a little academic, in the sense that i would like to see at the output, as a general rule, a signal similar to the input signal maybe amplified
I said anecoic chamber to take out the listening room interference
If i have a speaker spectacular in the anecoic chamber that fails to be linear in the listening room the problem is not the speaker but the room that needs treatment
Then there is the maybe the important point ... what measurements are more telling about the actual perceived sound quality of the speaker
I read here a 3D about a speaker very little linear but with a very low distortion that was judged very good at listening
So i guess high linearity is not the most important of requirements while low distortion could very well be
And you know what ? almost no magazine performs distortion measurements
Why ? i do not know but i would like to know of course
I have found one that indeed carries out these kind of measurements
And the results are impressive ... in some case in the bad way
For instance is very challenging to get high SPLs and low distortion at
freqs below 100 Hz with common also very expensive speakers
When people speak of prodigious bass from a 5" woofer ... well this means that they do not know was a real bass is ... completely
It is not their fault ... they have just not been exposed to a real shaking bass ... they do not know what they are talking about.

About instead sound from tube equipment i have an opinion but i should try some tests
I have found extremely interesting the 3D about damping factor
Usually tube equipment exhibit a much lower damping factor of solid state equipment
It could be that this low damping factor contributes to expand the sound more in the ambient
Maybe there is an optimum value for damping factor ?
But damping factor can also be decreased very easily in a soli state preamp/amp with just a resistor
A solid state amp that has received huge praise as a output impedance of about 0.34 ohm corresponding to a damping factor of 24 for a 8 ohm load.
My present amp has 150 for comparison.
Maybe this could be that optimal value ... i have to try anyway.
This could be also a reason why single ended equipment higher usually in out impedance sound nicer than the other equipment where the feedback reduces the out impedance to very low values giving a very high damping factor.
Low damping factor could be like wine ... it gives less control, but it is more fun
But i will try also with a preamp

Just out curiosity may i ask which speakers are you referring at that were wonderful measuring and failed to convince you on listening ?
I am very curious to know

Thanks again.
Kind regards,
bg


Edits: 07/02/14 07/02/14 07/02/14
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