Really? Listening to music I doubt anyone would be able to tell the difference between one speaker and the other with a 1.3db difference. Under very unique circumstances it could effect the balance a bit. But that would be really stretching the concept of pair matching. Your potentiometer volume control has worse track to track matching I promise.
1+ dB is unfortunately audible with some music in that region (easy to direct test with a PC or DSP/EQ) and decent preamps have definitely less channel deviation, my current rather entry class one has less than 0.1 dB at the typical listening levels:
| Volume position | Channel deviation |
| 1 | 0.1dB |
| 10 | 0.08dB |
| 30 | 0.04dB |
| 50 | 0.06dB |
| 70 | 0.05dB |
| 80 | 0.03dB |
| 96 | 0.007dB |
I agree, It is why I mentioned potentiometer. Most preamplifiers and receivers use a mechanical Potentiometer with two resistive
Again a 1+ dB channel deviation is audible and that's why such is tested in audio devices and just because many had such problems (usually less in the higher volume settings were it would be more audible) it doesn't make the problem be none. Same for room acoustics, of course they can add also some imbalance but this would additional and not an excuse to allow such in audio devices. About testing yourself of course even two files can be made with such an tested for example with the foobar ABX plug in.
OK. All I can tell you is that I design loudspeakers for a living. I am a musician, have hearing that other people consider special and can listen to music and tell what is going on that most people cannot. And for the sake of clarity I have done A/B testing using music. Specifically Ella Fitzgerald and Louis Armstrong with another person changing the settings Craig Devin of Avantone, Alesis, Behringer and a few other companies) and myself literally blindfolded. I was the golden eared tester of a number of loudspeakers that he was working on, and for which I had designed the AMT for. 1 db was not noticeable. I have done similar tests with other people with myself at the controls, and like myself under music conditions it takes 2 to 3 db before there is a discernible difference. And like myself a change in listening position from perfect is of greater difference than the effects that are created by a single db of change. When you have done the same testing in the real world I would love to talk it over a cup of coffee or tea or beer.
That wouldn't be bad if they just shelved the treble a little. I have to wonder how much a couple resistors can cost.
This is a normalized display. So the on-axis will always be a straight line. The off axis plots just show how different the off axis response is from the on-axis, however that on-axis really measures.The on axis looks SOTA for Devore, the off axis is something else.
The on axis I was refering to was the graph Keith posted, and I was joking about the SOTA as this is a Devore speaker.
In the designer’s ears perhaps.
I can't imagine liking it that way, but maybe the designer does.
Where can one view the non-normalized plot?
Post #647 above, or on the stereophile website for the full results.
The peak at 10k would hurt my ears. But a little EQ is no big deal anymore.
Mediocre measurements are just impossible to become exercised over aren’t they, give me a real stinker every time.
