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Synergy SA218S Powered
Speaker
Thank you for choosing Yorkville's Synergy
SA218S 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 SA218S is constructed of high strength multiply
birch plywood for ultimate durability. The SA218S
uses two 18-inch long-throw woofers.
Electronic Features
A Yorkville proprietary DSP platform provides processing
to prevent over-excursion (X-Max), voice coil overheating
(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 frequency sen-
sitive 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.
design. There is a large capacitor bank so that
bass transients are less dependent on the qual-
ity of the power line.
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-therm indicator
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
As a standard, the AC inlet on the SA218S 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.
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 SA218S 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.
1
The amplifier is a high headroom Class-D
The limiter indicators indicate when the X-max or
IMPORTANT: DO NOT EXCEED THE CURRENT RATING OF THE POWER and ACCESSORY CORDS.
PLEASE READ THE SECTION OF THIS MANUAL CALLED CASCADE INSTALLATION
LINE
CURRENT
10
10
8 8
LIMIT
7 7
10A = MAX Output
8A = 90% Output
5 5
7A = 80% Output
5A = 60% Output
SA218S
LEVEL
0 0
- 2
1
- 6
2
- 12
4
- 24
6
Off
Off
8
dB
VC
Therm
Input
Activity
Pwr
Clip
Limit
X-MAX
OUTPUT
ALL CONNECTED IN PARALLEL
INPUT
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