Who said that ???saying a perfect speaker in a room makes the perfect playback makes no sense at all
Who said that ???
saying a perfect speaker in a room makes the perfect playback makes no sense at all, since the response is all over the place depending on where we are in the room.
This is a rather purist approach and saying people are wrong in searching for the best room EQ is a little arrogant.
no more drugs for ever said thatWho said that ???
Humm OK but your right, it doesn't make sense, in the same way ofI see it a lot
sound alike amps , guess depends on REW sine wave tests connected to oscilloscope does it produce harmonic frequencies ? or does the denon 8500h pure on rca outputs , not tested stomaudio thou i expect it to be flawedHumm OK but your right, it doesn't make sense, in the same way of
"all amplifiers sound alike".
I don't think anyone's ever said that without some caveats, but we get accused of it all the time.
You lost me, what's your point?sound alike amps , guess depends on REW sine wave tests connected to oscilloscope does it produce harmonic frequencies ? or does the denon 8500h pure on rca outputs , not tested stomaudio thou i expect it to be flawed
saying a perfect speaker in a room makes the perfect playback makes no sense at all, since the response is all over the place depending on where we are in the room.
This is a rather purist approach and saying people are wrong in searching for the best room EQ is a little arrogant.
i been on heart medication , yes , yes it makes sense it does of course we think we have perfect speaker , so those manufactures keep telling us , mortal sheepsaying a perfect speaker in a room makes the perfect playback makes no sense at all, since the response is all over the place depending on where we are in the room.
This is a rather purist approach and saying people are wrong in searching for the best room EQ is a little arrogant.
My little flip phone doesn't do good video, I'll leave that to you.best you do the video , otherwise i keep reading text , text , its 21st century use that smart phone make a video
That hits the nail right on the head Adam!OK, correct me if I get this wrong (as I’m sure will happen) Target Curve is just another name for Preference Curve. Meaning during the scientific study conducted, a majority of participants “Prefered” a particular curve for (fill in the blank for Movie theater, Concert hall, House, Headphones, IEM’s and maybe even a Car.
It's more a result than a preference.OK, correct me if I get this wrong (as I’m sure will happen) Target Curve is just another name for Preference Curve. Meaning during the scientific study conducted, a majority of participants “Prefered” a particular curve for (fill in the blank for Movie theater, Concert hall, House, Headphones, IEM’s and maybe even a Car.
In the end this is about Personal Preference Curve. We don’t all agree and that’s just fine. You want more bass go for it. You want more treble fine. These is no absolute right answer. The best we have is under study conditions a test group of people preferred this cure or that curve. That also mans that a minority of the group did not prefer that curve. It’s your sound and your pleasure. There is no concrete right or wrong. Flavor to taste and enjoy the music/movie…
Here is a good read on the origins of the Target (Preference) Curve.It's more a result than a preference.
It's the result of a well made speaker in a room.When Amir measures speakers the estimated in room frequency response looks close to it when a speaker is decent.
Of course room will do it's thing down low and it will need correction up to the transition frequency.Higher than that one can not correct for room as the correction made only by in room measurements will include the reflections.
Agreed. A microphone is not a substitute for two ears and a brain - they "hear" things very differently!It's more a result than a preference.
It's the result of a well made speaker in a room.When Amir measures speakers the estimated in room frequency response looks close to it when a speaker is decent.
Of course room will do it's thing down low and it will need correction up to the transition frequency.Higher than that one can not correct for room as the correction made only by in room measurements will include the reflections.
All in-room measurements are affected by reflections, but there is a difference between short and long wavelengths.
For short wavelengths, e.g. a 20kHz sound has a 17.15mm wavelength (about 2/3"), several full cycles will be produced by the speaker before it reflects and arrives at the measurement mic. Thus it can be easily windowed out.
As wavelengths get longer, we reach a point where a single wavelength reflects before it reaches the mic. Measurement of any frequencies below this do not give the speaker response, but the room + speaker response. We can calculate this lower frequency limit with this equation:
F = c / (2* (x^2 + d^2)^0.5)
Where c = speed of sound (343m/s or 1125ft/s), x = 1/2 the distance between microphone and speaker, and d = distance to the nearest reflecting surface, usually the floor. Source.
Thus for a mic placed 1m from the speaker and 1m from the floor, we have 343 / (2*0.5^2 + 1^2)^0.5) = 153Hz. If you have a sofa which is 30cm from the microphone, it is 294Hz, meaning any frequency measured <294Hz is nonsense.
Bear in mind that microphone stands can be reflecting surfaces and contribute to little wiggles in the FR. Read more about it here.
Note this is not the Schroder frequency, that is something else entirely. Of course, the measurement is valid if our intention is room correction. But it is not a valid measurement of loudspeaker performance below a certain frequency.
I don't think that is quite all of it. If you have a "good speaker" (Flat on axis response , with smooth off axis response curve/ smooth directivity in an anechoic space) at the listening position in a room it will measure with a downward sloping FR i.e. like the Harman curve. The "curve" is not the preference, the "good speaker" is the preference and the curve is how a good speaker measures at the LP without any EQ. If you try to force a "bad speaker" to measure like a "good speaker" at the LP it may make things worse not better. The exception to this is below Schroeder frequency where room modes dominate and making EQ compensations (reducing room mode peaks, trying to fill dips is usually counter productive) is usually helpful.OK, correct me if I get this wrong (as I’m sure will happen) Target Curve is just another name for Preference Curve. Meaning during the scientific study conducted, a majority of participants “Prefered” a particular curve for (fill in the blank for Movie theater, Concert hall, House, Headphones, IEM’s and maybe even a Car.
In the end this is about Personal Preference Curve. We don’t all agree and that’s just fine. You want more bass go for it. You want more treble fine. These is no absolute right answer. The best we have is under study conditions a test group of people preferred this cure or that curve. That also mans that a minority of the group did not prefer that curve. It’s your sound and your pleasure. There is no concrete right or wrong. Flavor to taste and enjoy the music/movie…