User manual JBL PS120

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Manual abstract: user guide JBL PS120

Detailed instructions for use are in the User's Guide.

[. . . ] High Polymer Laminate /Polypropylene Woofers: provide tight bass and welldefined sound reproduction without harshness, stridency, or listener fatigue. High Quality Active Equalization Amplifier Circuitry: Integrating the acoustic and electronic systems into a single enclosure enable JBL engineers to employ an equalizer circuit that extends the bass response beyond the limitations of a small enclosure. Acoustically Optimized Enclosure: Optimized to produce an extended and level bass response. Magnetic Shielding: allows you to place your subwoofer near video monitors without creating interference or distorting the picture. 3 CONNECTIONS CAUTION: Before making any connections to your subwoofer, make sure the power to your entire system is OFF . [. . . ] For each channel, connect the red terminal on the receiver/T. V. /source amplifier to the red or (+) loudspeaker connection terminal on the PS subwoofer, and the black to the black or (-). Connecting the PS subwoofer this way ensures that both channels will be in phase; that is, working together not in opposition. Your PS subwoofer will accept stereo (left and right) inputs or a mono input (hooking up to just the left or right input) using either line level or speaker level input. your receiver/T. V. / source amplifier to produce the low bass while passing the unaltered signal source to the external speakers. "Speaker Level Output (to external speakers)" - Hook up the external speakers using twoconductor insulated wire following the same procedure described under Speaker Level Input. Connect the red (+) terminal of the PS subwoofer to the red (+) terminal of the external speaker, and the black (-) to black. Connecting the external speakers this way ensures that they will be in phase; that is, working together not in opposition. Connecting the speakers out of phase won't damage them, but will result in less bass and poor imaging. NOTE: Connecting your satellite speakers through your PS subwoofer won't change their impedance. LEVEL NOTE: when first setting up your PS subwoofer, set the Level control counter-clockwise to "Min" (minimum) before turning power switch ON. Turn power switch to On and use the "Level" knob to add the appropriate amount of bass to your main speaker output. Increase the subwoofer level by turning level knob clockwise until you find a setting that is pleasing to you. CAUTION: Never attach inputs to both line level and speaker level inputs of the same channel at the same time. OUTPUTS Your subwoofer has a speaker output terminal block to enable the signal to be sent to your main speakers or satellites. Your PS subwoofer can use the signal from 7 +- External Speakers - + Speaker Level Output (to external speakers) Crossover Frequency Level +R L+ 50 (Hz) 200 Min Max +R L+ Reverse Normal R L Speaker Level Input (from amplifier) Polarity Line Input PS Subwoofer Speaker Wire R +- L -+ R L Receiver, TV, or Amplifie FIG. 3: Speaker Level Output Connecti 8 CROSSOVER FREQUENCY Use the crossover frequency knob to adjust the upper end of the subwoofer's frequency response. The crossover control determines the highest frequency your subwoofer will reproduce. It allows a seamless transition from subwoofer to satellite speakers. When using small satellite speakers (without much low end), you want the crossover frequency more toward the upper end (200 Hz) to fill in the sound your satellites can't reproduce. [. . . ] It prevents the subwoofer driver from being damaged by accidental miss-use, assuring you of many years of excellent performance. GENERAL CARE Use a damp cloth for cleaning your PS subwoofer cabinet. Do not use detergents or other cleaners. TROUBLESHOOTING / SERVICE Your PS subwoofers should only be serviced by an authorized JBL repair station. It is fixed and should only be removed by qualified personnel. [. . . ]

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