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1. Power Switch and Indicator
The green power LED illuminates when the power switch is turned to the On position and AC voltage is sup-
plied. When the power is removed or the power switched is moved to the off position the green power indicator
will blink while the power supply is discharging. The processing circuitry will not reboot unless the power supply
is fully discharged before being turned back on. It is not necessary to reboot however. Turning the power back
on before the power supply is discharged will simply resume normal operation.
2. PowerCON TRUE AC Loop Thru
As a standard, the AC inlet on the SA115S 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
3. Input Jack
This female-XLR accepts line level XLR microphone cables. For best noise reduction use balanced sources.
4. Dual Link Outputs
These XLR male connectors can be used with a standard XLR cable to daisy-chain up to 20 SA115S cabinets
without signal degradation. Simply loop from one cabinet’s Link jack to the next cabinets Input jack. In many
cases this limit of 20 cabinets can be exceeded, consult Yorkville Sound for more details.
5. SA115S Level Control
This control adjusts the volume level of the SA115S relative to the input signal level. Mixers and other audio
sources connected to the SA115S tend to have different output voltages, which mean the level control on the
SA115S is used to fine tune the cabinet’s volume relative to the mixer settings. It is perfectly acceptable to set
the SA115S Level above or below the center 0 dB setting.
6. Clip, X-Max, VC-Therm, Activity Indicators
The Clip and Limit LED indicators illuminate to guide the user to proper operating levels.
Illumination either of the yellow Limit LEDs indicates that a level has been reached where the SA115S limit-
ers are reducing the signal internally to prevent damage or distortion. It also indicates that further increases in
input level or increasing the SA115S Level control position will not appreciably increase acoustic output.
The red Clip LED indicates that the input level is excessive and further increases in level will cause severe
distortion The input signal should be reduced at the source until Clip activity ceases. The clip indicator comes
on at 12 Vrms,16 volts peak. The input clips at 17 Vrms, 24 volts peak.
The activity Indicator comes on at 5 mVrms or -45 dBV.
7. Line Current Limit Control
The Line Current Limit control allows the power to be reduced to allow operation on limited power availabil-
ity. Full power transients will be allowed through but if the average power is excessive then the power will be
limited. This control works by advancing the limiter that limits the voice coil temperature and by monitoring
the current draw. In the 5 amp (2.5 amp CE) position the average power is limited only by the voice coil tem-
perature. In the 4 amp (2 amp CE) position with most music, the limiter will be only active occasionally de-
pending on the music content. In the 3 amp (1.5 amp CE) position certain types of music will not be limited,
primarily music without deep bass or where the bass is unprocessed. The 2 amp (1 amp CE) position will
significantly reduce the output when the music content has continuous bass content below 45 Hz. The green
power on indicator will dim to indicate when the line current limiter is active. A small amount of dimming
indicates that the advanced thermal limiter is active while significant dimming indicates that the line current
monitoring system has detected excessive line current. Low line voltage typically due to long power supply
cables may cause excessive line current, the line current monitoring system will prevent this from tripping
the power source circuit breakers.
