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Worst measuring loudspeaker?

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Purité Audio

Purité Audio

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Guess the £80k loudspeaker,

Keith
 

thewas

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Guess the £80k loudspeaker,

Keith
That is easy and obviously the on-axis response of a pair of Wilson Audio Alexia V, left, black; right, red; w. grille, blue :p
 

Ageve

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Audiovector SR3 Signature (~$5000):

Red: On-axis
Dark red: 15 deg horizontal
Yellow: 30 deg horizontal
Green/blue: +/- 7 deg vertical
Black: Grille on

Skärmavbild 2023-02-21 kl. 22.26.44.png
 

Svend P

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Jamo R907


209Jamfig3.jpg

These are mine. The reviews at the time did mention that the tweeter runs hot, which I agree with. Luckily one of them stopped playing, so I put in a pair of Bliesma T34 with a simple 1. order cross over instead. And because I bought them to also have a statue in the living room, I exchanged the midrange with the more expensive neo version that is black.

20210104_135307.jpg


I think the R907 was tuned to be a more "fun" loudspeaker. The bigger brother R909 measures better, but I thought it was a bit boring
Udklip.JPG
 
OP
Purité Audio

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Another Audiovector £53k
Seems an awful lot for what you get!

Keith
 

Dialectic

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Another Audiovector £53k
Seems an awful lot for what you get!

Keith
These nevertheless "epitomise the best of Danish audio design."

The guys who write for that rag ought to switch to selling used cars.
 

Ageve

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Alta Audio Adam ($17000):


323-altadamfig3.jpg

323-altadamfig4.jpg

323-altadamfig6.jpg
 

fpitas

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Alta Audio Adam ($17000):


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That's very creative. I'm not sure how to do that, even if I wanted it.
 

fpitas

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Alta Audio Adam ($17000):


View attachment 270066
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BTW, that write-up is one of the more alarming things I've read lately. It makes the engineer who designed this speaker sound like an idiot.
 
Last edited:
OP
Purité Audio

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I think I might have a go at this loudspeaker ’designing’ I have a free afternoon tomorrow.
Keith
 

Mnyb

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I think I might have a go at this loudspeaker ’designing’ I have a free afternoon tomorrow.
Keith
Beware of the dunning Kruger effect , don’t fiddle to much with such nonsense as science or engineering :) otherwise your confidence in your design may falter.
 

dougi

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Latest Audiovector for 53,000 pounds on HFNRR:

1678221861170.png
 

Mnyb

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Another Audiovector £53k
Seems an awful lot for what you get!

Keith
Audiovector my local hifi dealer way back had them they sounded noticeably worse the more expensive they get .
I always preferred the cheap dome tweeter versions . Less showroom sound , the detail is nothing but to much treble.
 

dougi

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Audiovector my local hifi dealer way back had them they sounded noticeably worse the more expensive they get .
I always preferred the cheap dome tweeter versions . Less showroom sound , the detail is nothing but to much treble.
Snap!
 

thewas

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Alta Audio Adam ($17000):


View attachment 270066
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Interestingly its horizontal directivity is well behaved, probably uses shallow crossover filters with large overlapping regions which would also explain the vertical problems:

323-altadamfig5.jpg
 

mwmkravchenko

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I read the measurement write up. It was amusing. I have been in front of these. And I agree with the measurements and the comments describing the mechanisms that are causing the problems. They are a boomy loudspeaker. The frequency response is all over the place. And with the right music it will sound kind of interesting for a little while. There is a time and a place for using microphones. And a time and a place for using music. But ideally that is music and or sounds that you know intimately from live sources. Not loudspeakers. Acoustic sources. Familiar things like your mates voice, your car door slamming. We all have cell phones. I can tell you that they record things decently. And if you want better recordings, get a mic and do it right. But the idea that you can get a recording right. And use that alone for driving a loudspeakers response is what happens in most of the examples you guys are posting. You need to understand the response, and the way your filters manipulate the response in order for you to form a final response from your chosen drivers. All that I read was a dressing down of what was done wrong. Nice to see the odd time in Stereo Pile.

Mark
 

Dennis Murphy

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Interestingly its horizontal directivity is well behaved, probably uses shallow crossover filters with large overlapping regions which would also explain the vertical problems:

323-altadamfig5.jpg
Aren't John's off-axis curves normalized to the listening window response, so tha this would actually show that the response doesn't get much better off axis?
 

MarkS

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Wow, were these developed using only an Etch A Sketch?
Of course the reviewer loved them: "Right now, these are the speakers I'd consider most if 20 grand were burning a hole in my pocket." :facepalm:
 
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