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#432257 - 05/20/19 10:05 AM Re: LFR1100 Active [Re: Mojo]
Ian Offline
President
connoisseur

Registered: 03/13/01
Posts: 1311


All is going AWESOME!
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Ian Colquhoun
President & Chief Engineer

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#432258 - 05/20/19 10:27 AM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 6263
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/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)

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#432259 - 05/20/19 10:38 AM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 6263
It's so beautiful. I can't stop looking at it. 2.5dB attenuation per decade!
_________________________
A-LFR/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)

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#432262 - 05/20/19 11:55 AM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 6263
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/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)

Top
#432263 - 05/20/19 02:11 PM Re: LFR1100 Active [Re: Mojo]
Ian Offline
President
connoisseur

Registered: 03/13/01
Posts: 1311
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.
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Ian Colquhoun
President & Chief Engineer

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#432264 - 05/20/19 02:30 PM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 6263
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/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)

Top
#432265 - 05/20/19 05:45 PM Re: LFR1100 Active [Re: Ian]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 189
Loc: Boston Area
Ha ... so let’s widen the window ... 20,25,30 degrees? I mean measurement window ... how wide till you see a reasonable deviation.

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#432266 - 05/20/19 05:55 PM Re: LFR1100 Active [Re: Ian]
rrlev Offline
veteran

Registered: 09/25/09
Posts: 189
Loc: Boston Area
Even more questions
What is the test setup .... you need to have walls to reflect off of ...

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#432267 - 05/20/19 06:45 PM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 6263
Nope. No walls needed. "Just" the Axiom anechoic chamber, a turntable, signal generator, mic, and waveform recorder.
_________________________
A-LFR/1000-8/500v4x2 coming
1000-2,3,1500-3
100,160,QS10x2,800,M5,M3,M50 v4
had v2
Air N2 (someday)

Top
#432268 - 05/20/19 08:47 PM Re: LFR1100 Active [Re: rrlev]
craigsub Offline
connoisseur

Registered: 12/15/03
Posts: 1810
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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LFR1100 actv, LFR1100, M100, M50, VP180HP, VP150, 3xEP800, M3, EP350, ADA1000-5, ADA1500-4 + 1500-6

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