Jbl e 250 p owners manual
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2 READ FIRST! Important Safety Precautions! 1.Read these instructions.2.Keep these instructions.3.Heed all warnings.4.Follow all instructions.5.Do not use this apparatus near water. 6.Clean only with a dry cloth.7.Do not block any ventilation openings. Install in accordance with the manufacturers instructions. 8.Do not install near any heat sources such as radiators, heat registers, stoves or other appara- tus (including amplifiers) that produce heat. 9.Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with one wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician for replacement of the obsolete outlet. 10.Protect the power cord from being walked on or pinched, par- ticularly at plugs, convenience receptacles and the point where they exit from the apparatus. 11.Only use attachments/ accessories specified by the manufacturer. 12.Use only with the cart, stand, tripod, bracket or table specified by the manufacturer or sold with the apparatus.When a cart is used, use caution when moving the cart/apparatus combination to avoid injury from tip-over. 13.Unplug this apparatus during lightning storms or when unused for long periods of time. 14.Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is dam- aged, liquid has been spilled or objects have fallen into the appa- ratus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped. 15.Do not use attachments not recommended by the product manufacturer, as they may cause hazards. 16.This product should be oper- ated only from the type of power source indicated on the marking label. If you are not sure of the type of power supply to your home, consult your product dealer or local power company. For prod- ucts intended to operate from bat- tery power, or other sources, refer to the operating instructions. 17.If an outside antenna or cable system is connected to the prod- uct, be sure the antenna or cable system is grounded so as to pro- vide some protection against volt- age surges and built-up static charges. Article 810 of the National Electrical Code, ANSI/ NFPA 70, provides information with regard to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connec- tion to grounding electrodes, andrequirements for the grounding electrode. See Figure A. 18.An outside antenna system should not be located in the vicin- ity of overhead power lines or other electric light or power cir- cuits, or where it can fall into such power lines or circuits. When installing an outside antenna sys- tem, extreme care should be taken to keep from touching such power lines or circuits, as contact with them might be fatal. 19.Do not overload wall outlets, extension cords, or integral con- venience receptacles, as this can result in a risk of fire or electric shock. 20.Never push objects of any kind into this product through openings, as they may touch dangerous volt- age points or short-out parts that could result in a fire or electric shock. Never spill liquid of any kind on the product. 21.Do not attempt to service this product yourself, as opening or removing covers may expose you to dangerous voltage or other haz- ards. Refer all servicing to quali- fied service personnel. 22.When replacement parts are required, be sure the service tech- nician 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. 23.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. 24.The product should be mounted to a wall or ceiling only as recom- mended by the manufacturer. Antenna Lead-In Wire Ground Clamp Antenna Discharge Unit (NEC Section 810-20) Grounding Conductors (NEC Section 810-21) Electric Service Equipment Ground Clamps Power Service Grounding Electrode System (NEC Art 250, Part H) The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. CAUTIONRISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: To reduce the risk of electric shock, do not remove cover (or back). No user-serviceable parts inside. Refer servicing to qualified service personnel. CAUTION: To prevent electric shock, do not use this (polarized) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated dangerous voltage within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. Figure A. Example of Antenna Grounding as per National Electrical Code, ANSI/NFPA 70
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SPEAKER 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 nor- mally omnidirectional, meaning the listener cant tell where they are generated from. However, frequencies between 75Hz and 150Hz can be localized, espe- cially 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 stronglyrecommends 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 determinewhere you hear the most pleasing bass performance. This would then be the ideal location for the subwoofer. SPEAKER CONNECTION When we designed the E150P and E250P powered subwoofers, our goal was to offer the user the best pos- sible performance combined with the most flexible and complete installation options. Please look over the following three examples to determine which description best matches your system and follow the corresponding hookup instructions. To use the binding-post speaker terminals with bare wire, unscrew the collar until the hole through the center post is visible under the collar. Insert the bare end of the wirethrough the hole in the post, then screw the collar back down until the connection is tight. The holes in the center of the collars are intended for banana-type connectors. Speakers and electronics termi- nals have corresponding positive (+) and negative (–) terminals. It is important to connect both speakers identically: positive (+) on the speaker to positive (+) on the amplifier and negative (–) on the speaker to negative (–) on the amplifier. Wiring out of phase results in thin sound, weak bass and a poor stereo image. NOTE: The speaker-level con- nection method described on page 4 is not a preferred con- nection and should only be resorted to if your receiver/ processor does not have a line-level or subwoofer output. The customer is responsible for proper connections, and any damage to JBL or other equip- ment due to improper connec- tions will not be covered by your JBL warranty. Consult with your JBL dealer or an audio- installation expert if you have any questions about how to connect your subwoofer using the speaker-level inputs. 3 THANK YOU FOR CHOOSING JBL For more than 50 years, JBL has been involved in every aspect of music and film recording and reproduction, from live performances to the recordings you play in your home, car or office. Were confident that the JBL system you have chosen willprovide every note of enjoy- ment that you expected – and that when you think about purchasing additional audio equipment for your home, car or office, you will once again choose JBL. Please take a moment to register your product on ourWeb site at www.jbl.com. This enables us to keep you posted on our latest advance-ments, and helps us to better understand our customers and build products that meet their needs and expectations. JBL Consumer Products