PSA1s Introduction
Congratulations on your purchase of the PSA1s. The PSA1s 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 PSA1s is fed a signal from a processor, electronic cross- over, 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 PSA1s 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 PSA1s just like an ordinary speaker (in paral- lel using the loop-through jacks) along with the passive full-range loudspeakers.
2. PSA1s Level Control
The Level control adjusts the amount of bass added to the sound system by the PSA1s. 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 PSA1s 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 PSA1s to almost any audio system with minimal hassle. Both ¼-inch and XLR inputs and Thru connections are supplied.
The PSA1s may be plugged in before or after the full-range loudspeaker. The PSA1s 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 PSA1s.
Note: As well as accommodating full-range loudspeakers, the Thru jacks allow many PSA1s subwoofers to be connected in a string (parallel). There is no practical limit to the number of PSA1s subwoofers that may be connected together.
4. Protection
The PSA1s 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 PSA1s will attempt to restart itself. If the fault persists, you should take your PSA1s 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 PSA1s’ built-in stand mounting adapter can be used with the Yorkville SW-Tube accessory to support either one or two of our PSA1 cabinets. The support tube can be used safely as long as the PSA1s is on a flat, level surface.
WARNING: Larger or heavier cabinets should NOT be used!
