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Re: LFR1100 Active
Mojo #432257 05/20/19 02:05 PM
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Ian Offline OP
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All is going AWESOME!


Ian Colquhoun
President & Chief Engineer
Re: LFR1100 Active
Ian #432258 05/20/19 02:27 PM
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M
axiomite
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OMG! The Listening Window and the Sound Power are ONE! Ian, you did it! You will go down in the annals of speaker history!


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2
Re: LFR1100 Active
Ian #432259 05/20/19 02:38 PM
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M
axiomite
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It's so beautiful. I can't stop looking at it. 2.5dB attenuation per decade!


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2
Re: LFR1100 Active
Ian #432262 05/20/19 03:55 PM
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M
axiomite
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I'm still looking at those damned curves. I can't believe the Directivity Index is practically zero across the entire audible range.


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2
Re: LFR1100 Active
Mojo #432263 05/20/19 06:11 PM
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Ian Offline OP
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Hi Mojo,

Bringing the curves together like this is working in the blind listen testing too. The realism factor has gone up another notch. I am really looking forward to getting this version back down to my place.


Ian Colquhoun
President & Chief Engineer
Re: LFR1100 Active
Ian #432264 05/20/19 06:30 PM
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M
axiomite
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You don't need to listen to it to know it's full of goodness. I mean, look at those curves. Compared to the passive 1100, they are far superior. I have no idea how Mattmanhasgonebutisbackdroolingandskeptical can possibly live with his passive LFRs!


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2
Re: LFR1100 Active
Ian #432265 05/20/19 09:45 PM
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devotee
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Ha ... so let’s widen the window ... 20,25,30 degrees? I mean measurement window ... how wide till you see a reasonable deviation.

Re: LFR1100 Active
Ian #432266 05/20/19 09:55 PM
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devotee
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Even more questions
What is the test setup .... you need to have walls to reflect off of ...

Re: LFR1100 Active
Ian #432267 05/20/19 10:45 PM
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axiomite
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Nope. No walls needed. "Just" the Axiom anechoic chamber, a turntable, signal generator, mic, and waveform recorder.


A-LFR/1000-8 & 2/500v4x2
1000-3,1500-3
100,160,QS10x2,800,M5x2,M2/3/50v4
Air Force, Freedom
had v2
Re: LFR1100 Active
rrlev #432268 05/21/19 12:47 AM
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Originally Posted By rrlev
Even more questions
What is the test setup .... you need to have walls to reflect off of ...


If memory serves, there are two curves posted. The red curve is the on axis curve. The blue is the average response of curves at 7.5 degree increments in both the horizontal and vertical plane, or 48 measurements in both the horizontal and vertical planes.

It is also done in the chamber to keep any effect of the sidewalls, floor and ceiling from occurring.

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