Diamond D9 & TDX TECHNOLOGY Owner's Manual page 18

GAIN SETTING BRIEF (cont.)
8. Turn the head unit volume down slowly until the clipping disappears. Make note of
the location of volume before clipping. This is the maximum undistorted output
level of the head unit.
Note: Output voltage can be read with the DMM on the 20 V AC scale by
attaching the meter to the alligator clips on the custom adapter cable.
9. Remove the custom adapter cable from the head unit and connect the head unit to
the next component in the signal path. (EQ, line driver, crossover, amplifier,
etc.)
10. Repeat above step 1 - 8 for each component in the signal path in order from the
head unit to the amplifier/s. Be sure to leave the head units volume at the
maximum unclipped output level discovered above.
a. If the component has an input level control as well as an output level
control: Turn the output level to approximately one quarter up. Slowly increase
the components input level until the sine wave clips and the decrease it until
there is no clipping. This is the maximum signal level the inputs can handle.
Slowly increase the output level as high as possible without clipping and move
to the next component.
b. If a component with only output level controls does not clip, leave the level
control set to maximum.
c. If the component does not have any level controls, it should pass the signal
without clipping. Test to ensure there is no clipping on this component. If
clipping does occur, lower the output level of the component before this one
until clipping stops. If the head unit is before this component, consider
replacing this component rather than lowering the head units output.
11. Set the gains on the amplifier/s to the minimum. Connect the Oscilloscope probes
to one channel on the amplifier. Slowly increase the gains on the amplifier until
the signal clips and then back it off until the clipping stops.
a. If the amplifier clips with the gains all the way down, decrease the output
level of the component before the amp until clipping stops.
12. Repeat step 11 for each amplifier gain in the system.
©2005 Diamond Audio Technology. All Rights Reserved
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