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1. Power Switch and Indicator
The green power LED illuminates when
the power switch is turned to the On posi-
tion and AC voltage is supplied. 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 neces-
sary 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 SA315S 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 SA315S cabinets without signal degradation. Sim-
ply 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. SA315S Level Control
This control adjusts the volume level of the SA315S relative to the input sig-
nal level. Mixers and other audio sources connected to the SA315S tend to
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have different output voltages, which mean
the level control on the SA315S is used to
fine tune the cabinet's volume relative to the
mixer settings. It is perfectly acceptable to
set the SA315S 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 SA315S limiters are reducing the signal
internally to prevent damage or distortion. It also indicates that further
increases in input level or increasing the SA315S 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. Average Power Limit Control
The average power limit control allows the power to be reduced to allow
operation on limited power availability. 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. In the 100% position the power is limited only by
the voice coil temperature. In the 75% position music with deep continu-
ous bass will be limited but many types of music will not. In the 50%
position only certain types of music will not be limited, primarily music
without deep bass or where the bass is unprocessed. Voice applications
typically will not be limited in the 50% position.
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