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Synergy SA221S Powered Speaker
Thank you for choosing Yorkville’s Synergy SA221S subwoofer, the companion subwoofer to the SA153. The SA
series excels in sound reinforcement applications where a line array is desired but cannot be easily accommodated.
Cabinet Features
The SA221S is constructed of high strength multiply birch plywood for ultimate durability. There are 2 woofers,
each 21-inch long-throw.
Electronic Features
A Yorkville proprietary DSP platform provides processing to prevent over-excursion (X-Max), voice coil over-
heating (VC thermal) and clipping. The DSP uses IIR filters for crossover and equalization and there is a small
delay added to time align with the SA153 top box. The X-Max limiter and the VC thermal limiter are both fre-
quency sensitive and calibrated to match the characteristics of the driver and cabinet system. The VC thermal
limiter can be advanced to limit the power draw in cases where there is less than ample power available. The
X-Max limiter is faster, pretty much instantaneous. The VC thermal limiter is slower reacting, typically operating
near the end of a bass beat at 120 bpm.
The amplifier is a high headroom Class-D design. There is a large capacitor bank so that bass transients are
less dependent on the quality of the power line.
The limiter indicators indicate when the X-max or VC thermal limiters are active. Typically, the X-max
limiter is more active but this is content dependent. The effect of the line power advance can be observed by
carefully watching these limit lights as the control is changed while operating in limit. The VC thermal indica-
tor will come on sooner as the Average Power limiter is advanced. With many types of music, the effect of
the VC-therm limiter will be minimal.
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
The SA221S is equipped with a powerCON TRUE inlet-outlet mains connector. The powerCON outlet at
the rear of the SA221S can power another Synergy cabinet. A special power cable accessory called SACA-
BLELOOP is required for this AC loop thru connection. Call your local Yorkville dealer about this accessory.
IMPORTANT: DO NOT OVERLOAD THE AC MAINS SUPPLY BY CONNECTING TOO MANY CABINETS
ON ONE CIRCUIT! PLEASE Read “LINE CURRENT LIMIT CONTROL” and “CASCADE INSTALLA-
TION” IN THIS MANUAL FOR TECHNICAL GUIDANCE.
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 SA221S 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. SA221S Level Control
This control adjusts the volume level of the SA221S relative to the input signal level. Mixers and other audio
sources connected to the SA221S tend to have different output voltages, which mean the level control on the
SA221S is used to fine tune the cabinet’s volume relative to the mixer settings. It is perfectly acceptable to set
the SA221S Level above or below the center 0 dB setting.
Summary of Contents for Synergy SA221S
Page 1: ...OWNER S MANUAL MANUEL DE L UTILISATEUR SA221S ...
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