LVH-900AS (Active Standard) ALC configuration

Overview

The LVH-900AS "Active Standard" models generally require six amplifier channels.

One ALC1604D 4-channel amplifier needs to be configured as bridged mono for the two LF sections. One ALC404D is used in 4-channel mode to drive the two mid-frequency and two high-frequency inputs on the cabinet. A total of six speaker level pairs most commonly drives each cabinet.

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 six amplifier channels for tuning and commissioning in the ArmoníaPlus software. Equalization must be applied to the full system (cabinet) to maintain the intended beamforming.

Care must be taken to recall the correct pattern. Each pattern has specific processing on each pass band.

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 speaker cabinet, 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
3. Select the "speaker" button at the top of the screen and select the desired Community Professional speaker model to add.
4. The speaker will appear in the workspace.
5. "Add" an ALC1604D from the "Amplifier" tab at the top of the screen.
6. "Add" an ALC404D from the "Amplifier" tab at the top of the screen.
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.
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 10. The "Bridge" indicator highlights at the top of the screen, click it to bridge the channels.
11. When bridged, a single white dash appears on the face of channel 1+2. Repeat the process for bridging channels 3+4.
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.
14. To load the amplifiers into the rack, click the "Assign" button on the rack and click on each amplifier.
15. "Add" an "Adv Group" from the groups dropdown above the speaker images. To assign the "Advanced Group" to the speaker for system equalization, click the "Assign" button on it then click the speaker.
16. Once the Advance Group is assigned to the speaker 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.
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 speaker will show vertical lines thru it denoting the (6) driver sections.
19. To link speaker inputs to amplifier outputs work left to right. 20. Select L1, it will turn orange. 21. Click on ALC1604D bridged channel 1. The speaker input side will automatically index to the next input, click ALC1604D bridged channel 2. 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.
24. Double check your work to ensure it will match the speaker wiring prior to applying signal to the system.
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" functions. 27. When you click on the speaker image, 7 mute buttons will be shown at the bottom of the screen and available for use.
28. You may also select amplifiers to un-mute individual channels
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.
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.
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.
32. The system EQ curve will be displayed on the "Advanced group" graphically.
33. We may configure the input signal source by selecting the "Config" button and the "Input" button on a per amplifier channel basis.
34. To configure the input matrix of racked amplifiers, select "Config" and Matrix at the bottom of the screen. 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.
36. A wide range of diagnostic functions may be shown by selecting the "Show" tab at the bottom of the screen.
37. A more condensed overview of amplifier functions and monitoring may be found by selecting "System List at the top of the screen.

Overview

ALC configuration

Further reading