Wilson Electronics Alexandria XLF, Owner'S Manual, Page: 48 / 94

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W i l s o n A u d i o S p e c i a l t i e s
the floor directly below your ear. You should be relaxed in your chair, as
you would be when listening to music (see Figure 13).
5. Now measure the distance (on the floor) from the point on the floor below
your ear to the base of the loudspeaker, as shown in Figure 13.
6. Refer to the Propagation Delay Tables (see Section 8) and locate the cor-
responding ear height for each module. There are three charts per module;
the first is a table determining the rear spike length, the second is a no-
mograph (accompanied by a table) determining each module’s rear spike
indent location, and the third table specifies the appropriate Tether Bolt
length.
7. Make a mark on the “Rear Spike Length” tables indicating the proper rear
spike for each module.
8. Note: The shortest spikes (labeled A) are always used at the front of all up-
per modules.
9. Make a mark on the “Rear Spike Detent Location” table indicating the
proper rear spike location for each module. Set this information aside as
you will refer to it in the next section.
10. After determining each module’s correct spike length, refer to the Tether
Bolt Table to determine the proper bolts to be used for each of the upper
two modules. Set these aside as you will need them later.
Section 4.3—Mounting Upper Array Modules
Materials Required
• Correct spikes for the modules. Refer to the Alexandria Propagation Delay
Tables and the procedure in the previous section to determine the correct
Aspherical Propagation Delay spikes necessary for each head.