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Biamp Cornerstone

LVH-900AP (Active Plus, Dual Cabinet) ALC configuration

This article provides step-by-step instructions for configuring Biamp's Community ALC (Amplified Loudspeaker Controller) for operation with the LVH-900AP series of Beamforming Venue Horns.


The LVH-900AP "Active Plus" models generally require 11 amplifier channels. 

Two ALC1604D 4-channel amplifiers need to be configured as bridged mono for the four LF sections. One ALC404D is used in 4-channel mode to drive the three mid-frequency sections and one ALC404D is used to drive the four high-frequency sections in the cabinets. A total of 11 speaker level pairs most commonly drives the dual cabinet array. 

All band pass filters, FIR filters, and limiters are included in the ALC presets. The user has the option to apply an input EQ across the 11 amplifier channels for tuning and commissioning in the ArmoníaPlus software. Equalization must be applied to the full 2-cabinet array to maintain the intended beamforming.

Care must be taken when recalling the three separate files from the speaker library. There is one file each for LF, MF, and HF. 

Each ALC must have its input matrix configured after loading the presets. It is highly recommended to use the same Dante or Analog input to drive each ALC, per dual cabinet system for ease of integration and to maintain the beamforming.   

Powersoft ArmoníaPlus 2.0 software is required for programming. Always download the latest amplifier and speaker preset files from the A+ Marketplace to ensure you have the most up to date Beamforming presets. Should a firmware update be required for your ALC, you must have an active internet connection. 

ALC configuration

1. Open Armonia+, Select "New project For Live Sound Project"  

2. Select the "design" and "Add" Button at the bottom of the screen 

1 Workspace Add.JPG

3. Select the "speaker" button at the top of the screen and select the desired Community Professional speaker model to add. There are 3 separate files for LF, MF, and HF that must be added to the workspace. 


1 select speakers.JPG
4. The speakers will appear in the workspace. Arrange as shown.  2 speakers workspace.JPG
5. "Add" (2) ALC1604D's from the "Amplifier" tab at the top of the screen.  3 1604D add.JPG
6. "Add" (2)  ALC404D's from the "Amplifier" tab at the top of the screen.  4 404D add.JPG
7. Your screen should look like this. If you make a mistake you may highlight an object and use the "Trash can" icon in the lower right corner of the screen to delete an item.   5 amps and speakers.JPG

8. To switch the ALC1604D amplifier to Bridge mode, activate the "Link" button at the bottom of the screen. 

9. Use "CTRL-Left Click" and highlight channel 1+2, 3+4 and the same on the 2nd 1604D. 

10. The "Bridge" indicator highlights at the top of the screen, click it to bridge the channels. 

6 bridge 1604D.JPG
11. When bridged, a single white dash appears on the face of those (4) channels 7  Bridged amps 7.JPG

12. To place the amplifiers in a rack (for ease of organization), select the "Add" button at the bottom of the screen again.

13. Select "Rack" next to the Amplifier tab. Click on the default description above it and label as desired. 

8 add rack name 8.JPG
14. To load the amplifiers into the rack, click the "Assign" button on the rack and click on each amplifier. 9 assign amps to rack.JPG
15. "Add" an "Adv Group" from the groups dropdown above the speaker images.  To assign the "Advanced Group" to the speakers for system equalization, click the "Assign" button on it then click each speaker. 11 add aadvance group.JPG

16. Once the Advance Group is assigned to the speakers it will look like this.

The "Adv Group" acts the the system equalizer across all channel inputs. We never equalize individual amplifier channels in a LVH-900 system. 

12 assign adv group assign-assign.JPG

17. To link amplifier outputs to loudspeakers we must select "Link" at the bottom of the screen.

18. Select "Split Mode" above the speaker. The speakers will show vertical lines thru it denoting the (11) driver sections. 

15 Link LF1.JPG

19. To link speaker inputs to amplifier outputs work left to right.

20. Select L1, it will turn orange. Click on ALC1604D bridged channel 1. The speaker input side will automatically index to the next input, click ALC1604D bridged channel 2 etc. 

22. Continue the process for Mids and Highs taking care to properly assign "Left to Right" starting on amplifier channel 1 of the ALC404D. 

23. Once all speaker inputs are linked to amplifier outputs as shown here, the band passes, limiting and Beamforming settings are loaded into the amplifier channels. 

17 all linked no MF 4.JPG
24. Double check your work to ensure it will match the speaker wiring prior to applying signal to the system.  16 all linked in order.JPG

25. The amplifier outputs are intentionally muted in the Beamforming presets. 

26. Once synchronized to physical amplifiers you may select the "Tune" tab in the lower left of the screen and "Mute" function. 

27. When you click on the speaker image, mute buttons will be shown at the bottom of the screen and available for use. 



18 tune Mutes by speaker.JPG
28. You may also select amplifiers to un-mute individual channels. 19 mute by amp channel.JPG
29. Armonia+ has a handy pink noise generator for initial testing if you select the "TestSys" tab at the bottom of the screen in "Tune" mode.   20 pink generator.JPG
30. When you select the "EQ" tab at the bottom, far right of the "Tune" screen you will be brought to the "Input" EQ for the system.  Beamforming presets have a preset 50Hz High-Pass filter.   20 Tune Adv Group EQ screen inout eq.JPG
31. A number of filter types may be selected from the top of the screen and dropped onto the graph. There are highly sophisticated and flexible equalization functions which you may want to read up on. 21 Tune Adv Group EQ screen inout eq viloter in.JPG
32. The system EQ curve will be displayed on the "Advanced group" graphically.  32 eq applied.JPG
33. We may configure the input signal source by selecting the "Config" button and the "Input" button on a per amplifier channel basis.  22 input source by channel.JPG

34. To configure the input matrix of racked amplifiers, select "Config" and "Matrix" at the bottom of the screen and select the input routing. Select the same input for all 3 cabinet sections. 

35. Adjust your input matrix as appropriate for your application. Double clicking on an input it will turn it up to "0 dB". You may manually adjust the matrix level also. 

23 Matrix by clicking amp.JPG
36. A wide range of diagnostic functions may be shown by selecting the "Show" tab at the bottom of the screen.  24 show tab headroom.JPG
37. A more condensed overview of amplifier functions and monitoring may be found by selecting "System List at the top of the screen.  25 System list.JPG
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