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7. HF (High Frequency) Adjust Selector
The HF Adjust switch is used to set the relative high frequency level of the SA102. If you are assembling mul-
tiple SA102 cabinets into an array, you may notice an increase in bass and a lack of treble. This is due to low
frequency coupling between the cabinets of the low frequency drivers. Setting this control to the number of
cabinets in the array will insure flat response from the system. As the number of cabinets increases the high
frequency output will be correspondingly increased.
The increase of treble will help overcome the natural loss of high frequency due to traveling a greater distance.
8. Clip and Limit Indicators
The Clip and Limit LED indicators illuminate to guide the user to proper operating levels. Illumination of the yellow
Limit LED indicates that a level has been reached where the SA102 limiters are reducing the signal internally to
prevent damage or distortion. It also indicates that further increases in input level or increasing the SA102 Level
control position will not appreciably increase acoustic output. The red Clip LED indicates that the input level is ex-
cessive and further increases in level will cause severe distortion. This happens at very high input signal levels in
excess of 13V peak. The input signal should be reduced at the source until Clip activity ceases.
2
The HF switch can also be used in applications where the loudspeakers are situated far from the audience.
Clip
Limit
Activity
INPUT
OUTPUT
OUTPUT
LEVEL
HF ADJUST
0
1
1
- 2
- 6
2
- 12
4
- 24
6
Off
8
NUMBER OF SA102
dB
CABINETS PER SIDE
Power
2
3
4-6
No Sub
SUB
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