Jbl ES 250P Owners Manual
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Extracted text from Jbl ES 250P Owners Manual (Ocr-read)
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2 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 apparatus (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 is 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, particularly 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 damaged, liquid has been spilled or objects have fallen into the apparatus, or the apparatus has been exposed to rain or moisture, does not operate normally or has been dropped. 15. Do not expose this apparatus to dripping or splashing and ensure that no objects filled with liquids, such as vases, are placed on the apparatus. 16. To completely disconnect this apparatus from the AC Mains, disconnect the power supply cord plug from the AC receptacle. 17. The mains plug of the power supply cord shall remain readily operable. 18. Do not expose batteries to excessive heat such as sunshine, fire or the like. 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. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte- nance (servicing) instructions in the literature accompanying the product. WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. IMPORTANT SAFETY INSTRUCTIONS
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JBL ®ES150P/ES250P Powered Subwoofers For more than 60 years, JBL has been providing audio equipment to concer\ t halls, recording studios and movie theaters around the world, and has be\ come the hands-down choice of leading recording artists and sound engineers. With the JBL ES Series, innovative technologies such as titanium-laminat\ e- dome tweeters, Elliptical Oblate Spheroidal ™(EOS) waveguides and PolyPlas ™ transducer reinforcement are available to you. Enjoy! Unpacking the Subwoofer If you suspect damage from transit, report it immediately to your dealer\ . Keep the shipping carton and packing materials for future use. PLACEMENT Since the installation of a subwoofer can be somewhat more complicated than installation of full-range speakers, it is essential that you read \ this section very carefully prior to connecting the subwoofer to your system. Should \ you have questions relating to your installation, it is advisable to call yo\ ur dealer or distributor for advice. The performance of the subwoofer is directly related to its placement in\ the listening room and how you align the subwoofer with its satellite speake\ rs. Setting the volume of the subwoofer in relationship to the left and righ\ t speakersis also of critical importance because it is essential that the subwoofe\ r integrate smoothly with the entire system. Setting the subwoofers volume level too high will result in overpowering, boomy bass. Setting the volume level too lo\ w will negate the benefits of the subwoofer. Here are several additional facts on installation that may prove useful.\ It is generally believed by most audio authorities that low frequencies \ (below 125Hz) are nondirectional and, therefore, placement of a subwoofer with\ in any listening room is not critical. While in theory it is true that the \ larger wave- lengths of extremely low frequencies are basically nondirectional, the f\ act is that, when installing a subwoofer within the limited confines of a ro\ om, reflections, standing waves and absorptions generated within the room wi\ ll strongly influence the performance of any subwoofer system. As a result,\ specific location of the subwoofer becomes important, and we strongly re\ com- mend that you experiment with placement before choosing a final location\ . Placement will depend upon your room and the amount and quality of bass required (for example, whether or not your room permits placement of th\ e subwoofer near either satellite). Figure 1. This example shows the subwoofer positioned behind the right-channel satellite speaker to re-create the actual location of bass instruments in an orchestra and/or add impact to movie soundtracks. INTRODUCTION 3