Wilson Alexandria XLF Measurements "Quite Poor"

Measurement was done at 2.4M ...:)

While I may be wrong, that still seems way too close to get realistic graph results. 7 and a half feet? I have speakers half the size and I sit further back than that....and I still feel that I need to sit back further.

Tom
 
okay that explains a lot , so i would say far to close for a giant speaker like that ,you need distance for all those drivers to blend in properly , and the microphone height ???
Does any body sit 2,4 meters away from a big speaker like that , i m sure not many , well maybe in hong kong.:D
I think wilson can answer that question about optimum listening height /distance in general for the X series

Technically speaking that is far enuff to measure the head module , JA could not measure further away due to the reflective path and interference. WA does not publish technical data , they should release their own technical specs and graphs ..

Regards
 
While I may be wrong, that still seems way too close to get realistic graph results. 7 and a half feet? I have speakers half the size and I sit further back than that....and I still feel that I need to sit back further.

Tom

94 inchs is a sizable way out to capture data , look and read thru his review carefully, notice efficiency was stated at 1 m not 94 inchs , if so that number would be 9 db lower , imagine the fits ...:)

Read into as you may , think of it as 6pm news , we are actually discussing the good parts
 
Most great speakers are "voiced". Even the famous Quad electrostatics were voiced - I remember Peter Walker explaining in an interview how he did it, and the different options he took for the ESL57 and ESL63. If you look at the example of the "good measuring speaker" presented in the triggering Soundstage letter (the Magico M5) it is clearly voiced.

Can you tell us which speakers you have owned or listened you consider that are not "voiced"?

BTW, if people would spend some time looking at ALL the published measurements, including the room averaged, they would find that most flat speakers have horrible in room measurements and the "abysmal engineering failure" symptom disappears in most rooms. I would say that most people voice their speakers for anechoic chambers, happily some great designers voice their speakers for the audiophile listening rooms. ;)

Bingo. Or any other audio component in the chain.

When was the last time you saw a speaker ad that ran "Buy the [insert name of speaker] because it's the only speaker that measures ruler flat from 20 Hz to 20 KHz!"
 
OK, here is end of the year riddle for all of you.

Here are two FR graps of two competing speakers, from two US manufacturers:

frequencylisteningwindo.gif

frequencylisteningwindo.gif


One manufacturer takes a regular beating from Doug for making poorly measuring speakers.
The other one, is beeing praised by Doug all-year-long for technical excellence.

Now the $1mil question: which is which ? :)
 
Thats a 10db scale , both are bumpy rides ....:)

Anyone worth their audio BVD's are voicing, doesnt mean they are not measuring , you can fly at night without instruments , but not in total darkness . Any and all audio equipment are interpretations of their designers , its an intricate balance between objective science and Subjective neurosis, one is debatable, the other the DNA...

Would you pick a wife looking at only her DNA , of course not , a test ride is a must, now what if her DNA said she could be a kook ...:)
 
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From what I can see both are within +/-2,5dB. Not bad.
 
Hello Myles

You're missing the point. The measurements should have never been published and anyone who puts any faith in them is barking up the wrong tree.

Why about publishing the measurements??

Rob
 
OK, here is end of the year riddle for all of you.

Here are two FR graps of two competing speakers, from two US manufacturers:

frequencylisteningwindo.gif

frequencylisteningwindo.gif


One manufacturer takes a regular beating from Doug for making poorly measuring speakers.
The other one, is beeing praised by Doug all-year-long for technical excellence.

Now the $1mil question: which is which ? :)

Get the top one and buy a sub? ;) Seems like other than bass, the top generally seems smoother and quite possibly flatter?
 
BTW, if people would spend some time looking at ALL the published measurements, including the room averaged, they would find that most flat speakers have horrible in room measurements and the "abysmal engineering failure" symptom disappears in most rooms. I would say that most people voice their speakers for anechoic chambers, happily some great designers voice their speakers for the audiophile listening rooms.

Hello Micro

Well here are two in-room averaged graphs. I own a pair of the JBL 1400 Arrays. From an engineering standpoint which do you think will be more neutral to the source?? The Arrays are flat inroom because they were designed that way just as the Wilsons are not. The Arrays are also pretty flat on axis asside from the the "hot" tweeter.

The way to avoid flat failing apart is to have the speakers be a constant/controlled directivity design

Rob:)
 

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Technically speaking that is far enuff to measure the head module , JA could not measure further away due to the reflective path and interference. WA does not publish technical data , they should release their own technical specs and graphs ..

Regards

IMHO it would be a terrible marketing mistake. People would not understand them and they do not have the resources (and perhaps desire) to publish and debate in public their findings about loudspeaker design. You also have to consider they were too busy all these years building and supporting with upgrades the users of more than 800 pairs of X1 and X2 loudspeakers ...
 
The bottom one is the one doug prefers ,although the top one isnt that bad either in my opinion it lacks bass though , the bottom one also uses a metal high freq dome ???:D

Actually, that is the other way round :D Upper graph, with a bass rolloff starting at 100Hz is the Magico V-2, and the lower one is the Wilson Sophia.
 
okay that explains a lot , so i would say far to close for a giant speaker like that ,you need distance for all those drivers to blend in properly , and the microphone height ???
Does any body sit 2,4 meters away from a big speaker like that , i m sure not many , well maybe in hong kong.:D
I think wilson can answer that question about optimum listening height /distance in general for the X series


the listening position for the X-2 or XLF must be a minimum of 9 feet for the aspherical propogation delay to be effective
 
IMHO it would be a terrible marketing mistake. People would not understand them and they do not have the resources (and perhaps desire) to publish and debate in public their findings about loudspeaker design. You also have to consider they were too busy all these years building and supporting with upgrades the users of more than 800 pairs of X1 and X2 loudspeakers ...

I would have to disagree Micro, if WA audio has better representation of their product why not counteract by releasing , they should and i would to counteract stereophiles published specs ...

Regards
 
Okay minimum , i reckon a measurement from lets say 4 meters would have given quite a different result , i still do think as wayne though that it looks like the XO is more in the area of 2,5khz but i am probably wrong
the listening position for the X-2 or XLF must be a minimum of 9 feet for the aspherical propogation delay to be effective
 

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