VII. Features, Controls, AC Power
A.SUB VOLUME CONTROL
Adjusts the output level of the PSB subwoofer only: This is not intended as a day-to-day volume control. See “IX. Setup Calibration”
The PSB subwoofer includes designed-in dynamic-range protection: it is virtually impossible to overdrive the subwoofer, regardless of volume setting or the demands of the program material. Where even higher levels of low frequencies are required, a second PSB subwoofer can provide a significant gain in total bass levels.
D.SUB CUT-OFF FREQUENCY CONTROL
Adjusts the high-frequency roll-off of signals sent to the subwoofer. Continuously variable from 50Hz to 150Hz for precise matching of subwoofer bass reproduction with the main (left and right) stereo speakers. See “IX. Setup Calibration”
B.ON INDICATOR LIGHT
The light is located between the control knobs. With both the 120 and 230 volt versions, the subwoofer is initially in stand-by mode awaiting the presence of an audio signal. When the subwoofer receives an audio signal the On indicator will illuminate. At the end of the audio signal the subwoofer will stay on for approximately 15 minutes.
Figure 1
(located on the front
of the subwoofer)
E.PHASE SWITCH
Selects the subwoofer output phase between in-phase (0°) and out-of-phase (180°), to compensate for the low to mid bass acoustic effects of different placement locations and listening rooms. See “IX. Setup Calibration”.
F.LFE INPUT/CROSSOVER BYPASS SWITCH
When active, the subwoofer variable low pass filter is bypassed so that this function can be accomplished by the low pass filter within a receiver/processor. See “IX. Setup Calibration”.
C.AC POWER CONNECTION
The PSB subwoofer has its own self-contained amplifier and thus requires AC power (keep this in mind when selecting a location). You may plug the power cord into any standard wall outlet and leave the connection in the wall as the PSB subwoofer draws extremely little current when idle. You may want to unplug your PSB subwoofer when it will not be used for an extended period such as a vacation.
