Bosch EVF-1122S/126 EVF-1122S/126-PIB User Manual

Electro-Voice EVF/EVH User Manual

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To configure for biamp operation, remove the switch card by drawing it toward you using the central finger 

hole. (The switch can also be removed with the end of a flat-blade screwdriver, by placing the blade end 

in the switch hole and using the adjacent edge of the input panel as a fulcrum. To facilitate this operation, 

there is a small recess in the edge of the input panel adjacent to the hole in switch card.) Reinsert the 

switch card in its biamp-operation position (right position in the picture of Figure 11).

All high-frequency waveguides have their horizontal and vertical patterns molded in for easy identification 

of orientation and are rotatable according to the following procedure:

1. 

With a #2 Phillips screwdriver, remove the four screws on each side of the enclosure and 

pop the grille out.

2. 

With a #2 Phillips screwdriver, remove the 12 screws holding the compression-driver/

waveguide assembly.

3. 

Rotate the assembly 90° and reinstall.

4. 

Reinstall the grille.

1. 

With a #2 Phillips screwdriver, remove the four screws on each side of the enclosure and 

pop the grille out.

2. 

With a #2 Phillips screwdriver, remove the four screws holding the compression-driver/HF 

waveguide assembly.

3. 

Use a 6-mm Allen (hex) wrench to remove the two rails that hold the HF waveguide

 assembly.

4. 

Use a 4-mm Allen (hex) wrench to remove the four screws holding the hard foam

 

mid-frequency waveguide contours in place on the left and right sides of the enclosure. 

Figure 12 shows a contour in the process of being removed.

5. 

Rotate and reinstall the contours in the top and bottom of the enclosure.

6. 

Reinstall the two rails that hold the HF waveguide assembly.

7. 

Rotate and reinstall the compression-driver/HF waveguide assembly.

8. 

Reinstall the grille.