Manual

PRE-CONFIGURING THE LCA16 PRIOR TO INSTALLATION,

16 or FEWER MICS PER LCA16

This procedure should be performed prior to installation. The LCA16 SYSTEM WORKSHEET (Appendix 2) will

assist you in setting up the LCA16 before going on site. While the actual setup is quite simple, it is recommended

that you use this worksheet, especially if this is your first installation using the LCA16 Logic Controlled Amplifier.

Using the LCA16 SYSTEM WORKSHEET

PROCEDURE 1 - Use this procedure if you have 16 or fewer microphones per LCA16 in this installation. This

procedure assumes a 1:1 relationship between microphones and logic terminals. If you have more than 16

microphones per LCA16, then skip this section and use procedure 2.

To fill out this chart, you need a floor plan of the room showing both speaker and microphone placement. See

below for an example of a floor plan with notations showing mics, speakers, and attenuation zones.

STEP 1 - On your floor plan, assign consecutive numbers to each microphone, starting with #1.

STEP 2 - Assign consecutive numbers to each speaker on the floor plan, again starting with #1.

STEP 3 - On your LCA16 SYSTEM WORKSHEET, assign the microphones to logic inputs in the first column on

the left. Simply transfer the microphone numbers from your floor plan to the crossed boxes. See

Example 1.

STEP 4 - Assigning Attenuation Levels In this step you will be noting in each box how much the speakers will

be affecting each microphone.

4A Start with the box where the SPEAKER 1 column intersects the microphone 1 (logic input 1) row. Check you

floor plan. If speaker 1 will be a potential source of feedback for microphone 1, then mark that box. Use an

"A" for speakers which are very close to the microphone and a "B" for those which are located further from

the microphone. While still referring to the floor plan, move down to the next box in the speaker 1 column

where it intersects the microphone 2 row. If speaker 1 will also affect microphone 2, then mark that box

accordingly.

If this speaker will have no effect, then leave the box blank.

4B Repeat this step for every box in the grid where a speaker and microphone/logic input intersect.

1 2 3 4

Assigned

Mics

SPEAKER

CHAIR

SPEAKER

MICROPHONE

EXCERPT FROM

ROOM PLAN

A LEVEL ATTENUATION ZONE FOR MIC 1

B LEVEL ATTENUATION ZONE FOR MIC 1

TABLE

STEP 4

STEP 3

SPKR

Figure 6 - Example 1