User manual JBL PSW-D112

[. . . ] The product may fall, causing serious injury to a child or adult, and serious damage to the product. Use only with a cart, stand, tripod, bracket or table recommended by the manufacturer, or sold with the product. Any mounting of the product should follow the manufacturer's instructions, and should use a mounting accessory recommended by the manufacturer. The product should be mounted on a wall or ceiling only when and as recommended by the manufacturer. [. . . ] When replacement parts are required, be sure the service technician has used replacement parts specified by the manufacturer or that have the same characteristics as the original part. Unauthorized substitutions may result in fire, electric shock or other hazards. Upon completion of any service or repairs to this product, ask the service technician to perform safety checks to determine that the product is in proper operating condition. Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel. All the safety and operating instructions should be read before the product is operated. The safety and operating instructions should be retained for future reference. All warnings on the product and in the operating instructions should be adhered to. All operating and use instructions should be followed. The product should not be used near water ­ for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement or near a swimming pool, and the like. ­2­ Placement · As a general rule, bass response increases as a subwoofer is placed closer to a wall. Therefore, bass output is maximized when the subwoofer is placed in a corner. · It is also recommended that the subwoofer be positioned along the same wall as the front loudspeakers. Low-frequency sounds are normally omnidirectional, meaning the listener can't tell where they are generated from. However, frequencies between 75Hz ­ 150Hz can be localized, especially at higher volume levels. Positioning your subwoofer as recommended will provide the most natural soundstage and imaging from your loudspeaker system. Remember that these are just guidelines. Since every listening room is different, JBL strongly recommends experimenting with the positioning of your subwoofer to obtain the most pleasing results in your room. One technique that can help you find the ideal subwoofer location is to temporarily place the subwoofer near the main listening location. Then move around the room and determine where you hear the most pleasing bass performance. This would then be the ideal location for the subwoofer. 120 90 60 150 180 High Pass Hookup When we designed the PSW-D112 powered subwoofer, our goal was to offer the user the best possible performance combined with the most flexible and complete installation options. Please look over the following four examples to determine which description best matches your system and follow the corresponding hookup instructions. 1) If your receiver/amplifier has no subwoofer outputs or preamp outputs for the left, center and right channels. RECEIVER/AMPLIFIER SPKR In Left Right Phase 180 120 L R 0 90 60 150 180 Low Pass ­ + ­ + L R SPKR Out L L R Out Line Level R In ­ + ­ + LEFT SPEAKER RIGHT SPEAKER Power On Off PSW-D112 Digital Amplification ­3­ 2) If your receiver/amplifier has subwoofer outputs or preamp output jacks for the left and right channels. 3) If your receiver/amplifier has a single (mono) subwoofer output or LFE output, you may connect the output to either the Left or Right line-level input on the subwoofer. [. . . ] There are no right or wrong settings; this switch offers the added flexibility to adjust your subwoofer for optimum performance for your specific listening conditions. Should you decide to fine-tune your system for optimum performance, be patient and trust your ears. It will be worth the effort involved to fully "tweak" your system. · Check that receiver/amplifier is on and a source is playing. · Check that powered subwoofer is plugged in. [. . . ]