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KEF LS50 playground - measurements of raw drivers in factory cabinets and simulations
KEF LS50 playground - measurements of raw drivers in factory cabinets and simulations
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Old 23rd May 2019, 08:19 AM   #61
Zvu is offline Zvu  Serbia
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Quote:
Originally Posted by Juhazi View Post
.............

As a teaser, typical room response of 3-way floorstanders, (both Wilson Audio)
Click the image to open in full size.
I just saw this Juha,

I'm not sure that flat in room response is that pleasant to listen in the long run. Usually there is roll off of around 6dB from 200-20000Hz. Flat could well be quite bright sounding. Anechoic averaged measurements Atkinson does are tilted about 4dB upwards 1000Hz-20000Hz. Those are averaged so who knows how on axis measurement looks like.

Click the image to open in full size.
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Old 23rd May 2019, 08:30 AM   #62
maty tinman is offline maty tinman  Spain
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Default Plutone

Quote:
Originally Posted by Zvu View Post
I just saw this Juha,

I'm not sure that flat in room response is that pleasant to listen in the long run. Usually there is roll off of around 6dB from 200-20000Hz. Flat could well be quite bright sounding...
I agree. Better with a negative slope like DIY Plutone by Tony Gee:

Tony Gee Plutone

Click the image to open in full size.
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Old 23rd May 2019, 10:06 AM   #63
Juhazi is offline Juhazi  Finland
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I was looking at bass response!
But I like flat upper end of a single speaker as well. Perhaps because of my impaired hearing. Never heard Wilson's but most KEF Uni-Q speaker have too soft high treble for me.

Actually the Wilsons' room response goes 4-5dB down 3-10kHz. Measured room response is always affected by interference from boundaries, but still doesn't show decay spectrum, which is important for the perceived sound balance too. I have noticed that 1-4kHz decays slower in most rooms of what I have measured.

My dauhter's room has concrete walls and big windows, but is large.
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Last edited by Juhazi; 23rd May 2019 at 10:22 AM.
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Old 25th May 2019, 04:56 PM   #64
Zvu is offline Zvu  Serbia
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Here is horizontal radiated power at angle of 180 degrees (+/-90 degrees in regard to on axis):

Укупно хоризон .png

And here are individual curves:

Од 0 до 90 степени х .png
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Old 25th May 2019, 06:08 PM   #65
maty tinman is offline maty tinman  Spain
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Original or your last LS50 crossover?
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Old 25th May 2019, 06:37 PM   #66
Zvu is offline Zvu  Serbia
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My PSM XO.

I will measure original some time though. Probably when i open them to put PSM XO in.
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Old 25th May 2019, 06:58 PM   #67
Juhazi is offline Juhazi  Finland
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Quote:
Originally Posted by Zvu View Post
Here is horizontal radiated power at angle of 180 degrees (+/-90 degrees in regard to on axis):

Attachment 758919

And here are individual curves:

Attachment 758918
Nice! Can you somehow overlay VCAD sim and measured responses? 0 30 60 ¤ I guess you made the sim using your measured responses of individual drivers.
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Old 25th May 2019, 07:14 PM   #68
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Those are measured responses but since Holmimpulse can't show more than 3 measurements, i just imported them in LspCad. Radiated power is derived from those measurements from picture no.2 It is a combination of all 10 measurements.
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Last edited by Zvu; 25th May 2019 at 07:17 PM.
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Old 25th May 2019, 08:18 PM   #69
Zvu is offline Zvu  Serbia
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Here's sim vs measured response. Black sim, red measured.

On axis

На оси.png


30 degrees off axis

Тридесет степе .png

Slight differences are mainly from measurement conditions since for deriving sim files i had 10ms gate time and in my home i can achieve 4-5ms at best.

Not too bad
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Last edited by Zvu; 25th May 2019 at 08:20 PM.
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Old 26th May 2019, 10:54 AM   #70
maty tinman is offline maty tinman  Spain
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Quote:
Originally Posted by Zvu View Post
Here is horizontal radiated power at angle of 180 degrees (+/-90 degrees in regard to on axis):

Attachment 758918
versus HEDD Type-05

Yes, you can hear Phase differences !
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Last edited by maty tinman; 26th May 2019 at 10:56 AM.
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