YORKVILLE SYNERGY SA153 Manuel De L'utilisateur page 4

5. HF (High Frequency) Adjust Selector
The HF Adjust switch is used to set the relative high frequency level of the SA153. If you are assembling mul-
tiple SA153 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.
6. 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 SA153 limiters are reducing the signal internally to
prevent damage or distortion. It also indicates that further increases in input level or increasing the SA153 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.
7. Power Switch and Indicator
The green power LED illuminates when the power switch is turned to the On position and AC voltage is supplied.
8. PowerCON TRUE AC Loop Thru
As a standard, the AC inlet on the SA153 accepts locking PowerCON TRUE power cords. There is also an AC
outlet that can be used to loop power through to other cabinets in your array using a male to female PowerCON
TRUE looping power cord. Check with your local Yorkville dealer for availability of these accessory cords.
IMPORTANT: DO NOT EXCEED THE CURRENT RATING OF THE POWER and ACCESSORY CORDS.
PLEASE READ THE SECTION OF THIS MANUAL CALLED CASCADE INSTALLATION
2
The HF switch can also be used in applications where the loudspeakers are situated far from the audience.
YS Part Name
SAPICKUPBAR1 Pickup Bar
SABUMPER1 Flying Bumper
SACABLELOOP AC Loop Cable
SA153COVER SA153 Cabinet Cover
SA315SCOVER SA315S Cabinet Cover
SADOLLY1 Cabinet Dolly
Optional Synergy Series Accessories
Descrip on
Single column cabinet hanging hardware (2x SA153 plus 1x SA315S MAX)
4 wide flying bumper (8x SA153 plus 4x SA315S MAX)
6 foot male to female PowerCON TRUE looping power cord
Covers two cabinets (stacked)
Covers one cabinet
Holds 2x SA153 (stacked) or 1 x SA315S