1
PSA2s Introduction
Congratulations on your purchase of the PSA2s.
The PSA2s is a premium-quality integrated
subwoofer and power amplifier. It has been
designed to be the perfect complement to our
Paraline Series PSA1 powered speaker.
1. Input Level Switch
The Input level switch is provided to choose
between line-level and speaker-level signals.
The line-level position is for use when the PSA2s
is fed a signal from a processor, electronic crossover, the
output of an un-powered mixer, or the loop-through of a powered
speaker cabinet. When using the line-level mode, the use of balanced
¼-inch (Tip, Ring, Sleeve) and/or XLR cables will reduce the unit’s sensitivity
to hum and buzz.
The speaker level position should be used when the PSA2s is fed with a ¼-inch speaker cable
from the output of an amplifier or a powered-mixer, or from the parallel connection on an un-powered
speaker cabinet. For speaker level operation, connect the PSA2s just like an ordinary speaker (in paral-
lel using the loop-through jacks) along with the passive full-range loudspeakers.
2. PSA2s Level Control
The Level control adjusts the amount of bass added to the sound system by the PSA2s. This control
adjusts for the relative sensitivity of the companion full-range loudspeakers and the desired system
frequency response. This control should be set by listening with a medium-level input signal (such
that the limiter is not firing).
Note: It is not recommended to set this control at high levels since the limiter determines
the output level.
Note: A setting at the center detent on the PSA2s Level control is the correct starting point
when setting up a sound system. From there, adjustments can be made for the best sound.
The detent is the setting that will give full power when the line input is used and the input
signal is at a level of +3 dBV.
3. Input Jacks
The inputs are designed to make it easy to hook up your PSA2s to almost any audio system with
minimal hassle. Both ¼-inch and XLR inputs and Thru connections are supplied.
The PSA2s may be plugged in before or after the full-range loudspeaker. The PSA2s does not alter
the signal to the daisy-chained (thru) loudspeakers and will not draw any power from the host amplifier/
processor driving them. Also, note that an external crossover is not necessary when using the PSA2s.
Note: As well as accommodating full-range loudspeakers, the Thru jacks allow many PSA2s
subwoofers to be connected in a string (parallel). There is no practical limit to the number of
PSA2s subwoofers that may be connected together.
4. Protection
The PSA2s has several internal protection mechanisms against over-current, over-excursion,
clipping, and excessive average power output. In some cases, when protection is activated, the
output will be cut off. In these cases, the power LED will blink, and the PSA2s will attempt to restart
itself. If the fault persists, you should take your PSA2s to the nearest authorized service center for
repair by a qualified service technician.
At high power levels when the limiter is operating, increasing the subwoofer level control will not
increase the output. For the best results, set the system so that the limiter LED occasionally (a few
times per second) lights up. The limiter is present in the circuit at all times to prevent distortion and
to prevent over-excursion of the speakers.
Note: The PSA2s’ built-in stand mounting adapter can be used with the Yorkville SW-TUBEHD
accessory to support either one or two of our PSA1 cabinets. The support tube can be used safely
as long as the PSA2s is on a flat, level surface.
WARNING: Larger or heavier cabinets should NOT be used!
