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QuickStart-PSA1-00-1v0 • YS#8910 (PSA1) • September 24, 2020
1. Power Switch & Indicator
The green LED indicates the power switch is
turned On and AC voltage is supplied.
2. AC Input and Output
The AC inlet accepts locking IEC power cords.
There is also an AC outlet that can be used to
loop power through to other cabinets in your ar-
ray using a male to female looping power cord.
Warning: Do not exceed a total load of 10 A
on the looping AC chain.
3. Input Jack
The XLR / ¼-inch TRS combi-jack accepts line
level XLR or ¼-inch TRS patch cables. For best
noise reduction use balanced cables.
4. Link
The male XLR connector can be used with a
standard XLR cable to daisy-chain up to ten
PSA1 cabinets without signal degradation.
5. PSA1 Level
Adjusts the volume relative to the input signal
level. Normal operation will be between 10
o’clock and 2 o’clock.
6. LF Mode
The LF switch allows the user to configure the
PSA1 to be used with or without a subwoofer.
In Fullrange mode, the PSA1’s high-pass
(low-cut) filter is set to 40 Hz. When using the
PSA1 with a subwoofer depress the LF button
to set the internal high-pass filter to 100 Hz.
Most powered subs have their low-pass filter
set at around 100 Hz.
7. HF Mode
The HF Mode switch is used to set the rela-
tive level of the horn in the PSA1. In normal
use, set the HF switch to Flat. The HF switch
can also be used where the loudspeakers are
located far from the audience. The increase
of treble will help overcome the natural loss
of high frequency due to traveling a greater
distance.
8. Clip and Limit
The Clip and Limit LEDs illuminate to help set
proper operating levels. The yellow Limit LED in-
dicates that a level has been reached where the
limiters are reducing the signal internally to help
prevent damage or distortion. It also indicates
that further increases in input level or increas-
ing the PSA1 Level control position will not ap-
preciably increase acoustic output. The red Clip
LED indicates that the input level is excessive
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 immediately
until Clip activity ceases.
Set-Up Example
1. Place the PSA1 on a stand at the appropri-
ate angle. Use the 0° pole position if mounting
one cabinet on a pole and use the –7.5° posi-
tion if stacking two cabinets.
2. If you are stacking a second cabinet, be sure
to connect the safety lanyards on the bottom
cabinet to the handles of the top cabinet.
3. Connect power to all cabinets. For tidy
cabling, run power to one cabinet and use
male to female AC loop cords to power the
remaining cabinets.
4. Using a balanced or unbalanced shield-
ed cable, connect the left or right line-level
(not speaker level) output of your mixer to
the Input connector.
Note: If you are using a mono setup,
connect the mono line-level output from
your mixer to the Input jack on the PSA1.
5. For stand-alone use of the PSA1 without
a subwoofer, set the LF switch to the Full-
range setting. When using the PSA1 with the
PSA1s subwoofer, depress this pushbutton
to the Sub setting.
6. If one or more PSA1 cabinets are being
stacked above one another, set the HF switch
to Boost on the upper or all cabinets depend-
ing on your live setting.
7. It is best to set the Level at the center de-
tent initially. Set your mixer level so that the
Limit LED is occasionally flashing with your
hottest signal. If the Clip LED lights, turn
your mixer down.
Clip
*HF Boost
recommended
for multiple
box arrays.
Limit
Power
w/Sub
Fullrange
LF
Level
Boost*
Flat
HF
Min
Max
Link
Input
PSA1
