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#431685 - 04/01/19 02:50 PM Re: LFR1100 Active [Re: Ian]
rrlev Online   content
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Registered: 09/25/09
Posts: 113
Loc: Boston Area
Think you'll have to come out with a 10 channel amp to go with.

Or perhaps put the active crossover in a 5 channel amp ... that way one can get each closer to the speaker ... or just put the whole thing in the speaker. Unless you need both channels to process the LFR signal ... (which I'm thinking might be a real possibility)


Edited by rrlev (04/01/19 03:01 PM)
Edit Reason: more on the thought

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#431686 - 04/01/19 08:45 PM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 5930
Ian, how is the directivity on those active LFRs? Are you able to get the listening window and sound power curves to pretty much lie on top of each other?
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M100,VP160,QS10HPx2,EP800,M5HP,M3,M50 v4
M80,VP150,QS8x4,EP600 v2
ADA-1000-2,3,1500-3
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#431689 - 04/02/19 03:24 AM Re: LFR1100 Active [Re: rrlev]
Ian Offline
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Registered: 03/13/01
Posts: 1299
Hi rrlev,

An ADA1500-5 per speaker would work really well. Since there is one DSP per speaker the amp/DSP combo can be over by each speaker. I did think about putting the DSP and an ADA1500-5 in the speaker. It would save a lot of wiring as you would just need to plug each speaker into the wall. Our 4in1 Transmitter/pre-amp/AxiomAir could send the information to each speaker wirelessly.



But the speaker would have to get quite a bit taller to house all this amplification and the DSP. As it is you could still use the 4in1 Transmitter/pre-amp/AxiomAir and have the receiver mounted in the DSP for each speaker so the wiring would be minimal, just 5 short speaker wires if the amp is near the speaker and the interconnects from the DSP to the amp.
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#431690 - 04/02/19 03:43 AM Re: LFR1100 Active [Re: Mojo]
Ian Offline
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Registered: 03/13/01
Posts: 1299
Hi Mojo,

Yes we are. It is pretty cool to have this much control in the design phase. The flip side is the mathematical nightmare of all those curves coming together. You have five distinct radiating patterns to work with to give you the final result at each 7.5 degree increment in the Spinorama. Since adjusting one affects all the others you can kind of get the picture.
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#431692 - 04/02/19 10:39 AM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 5930
Originally Posted By Ian
Hi Mojo,

Yes we are. It is pretty cool to have this much control in the design phase.


Then we're all in big trouble. We all need to upgrade to LFR actives.

Originally Posted By Ian
The flip side is the mathematical nightmare of all those curves coming together. You have five distinct radiating patterns to work with to give you the final result at each 7.5 degree increment in the Spinorama. Since adjusting one affects all the others you can kind of get the picture.


Yes, that's why we need one driver to rule them all. But it's so much fun to play God with speaker systems. smile

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#431694 - 04/02/19 03:54 PM Re: LFR1100 Active [Re: Ian]
MatManhasgone Offline
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Registered: 05/06/14
Posts: 1053
Loc: Lost in the great wide yonder
So if I popped my head in next Thursday, could I see a working demonstration? Just Wondering??
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#431701 - 04/04/19 02:14 AM Re: LFR1100 Active [Re: MatManhasgone]
Ian Offline
President
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Registered: 03/13/01
Posts: 1299
Hi Matt,

A week or two later would be better if you can swing it. Right now everything is at my place.
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Ian Colquhoun
President & Chief Engineer

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#431707 - 04/04/19 12:35 PM Re: LFR1100 Active [Re: Ian]
brwsaw Offline
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Registered: 10/12/12
Posts: 1936
Loc: Canada
Win win
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#431708 - 04/04/19 01:11 PM Re: LFR1100 Active [Re: Ian]
Mojo Online   content
axiomite

Registered: 01/21/07
Posts: 5930
Mat, what Ian isn't telling you is that he blew the sh!t out of the test gear Andrew gave him. He hooked up 5 ADA-1500s to each LFR. When that "worked", he jumpered the ADAs for bridged mono mode and launched the HP drivers across the room with smoke trails and tendrils of voice coil trailing behind them. At least that's how the dream I had last night went.
_________________________
M100,VP160,QS10HPx2,EP800,M5HP,M3,M50 v4
M80,VP150,QS8x4,EP600 v2
ADA-1000-2,3,1500-3
Air N2

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#431736 - 04/07/19 03:54 PM Re: LFR1100 Active [Re: Ian]
brwsaw Offline
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Registered: 10/12/12
Posts: 1936
Loc: Canada
Lol
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Haven't had a summer this nice in a long time.

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