Bose 501 Series III Loud Owner's guide - Page 4

b. when a normal stereo image is desirable; e.g., medium. sized performing groups. "studio" rock and disco. Control positions 4 and 5 provide maximum reflected sound energy at high frequencies. These positions should be used: a only if there is a sound-reflecting surface within112/ -3 feet (45-90 cm) of the outward-firing tweeter system; b. when a wide stereo image is desirable; e.g., symphonic performances, live concerts and electronic music. These guidelines are based on experiments conducted in a wide range of acoustic environments and may not apply in every listening situation. Try various combinations of control settings on each speaker to obtain a spatial balance that satisfies your specific requirements. It Is not always necessary to adjust both Direct Energy Controls the same way. 9. Room Acoustics 1. Your Bose 501- system works best when sound energy is given room to develop "around" the speakers, reflecting off nearby walls. Hard materials such as wood, brick, glass, sheetrock and/or sturdy paneling generally provide the most effective sound-reflecting surfaces. 2. If your room contains few furnishings with bare walls and floors, the music may sound unnaturally shrill or bright. The addition of carpeting, wall hangings and drapes usually helps to alleviate this problem. Distribute these furnishings evenly around the listening area for best results. 3. Rooms filled with stuffed furniture, unusually heavy carpeting or drapes can absorb much of the high-frequency energy radiated by your speakers. Such rooms often make reproduced music sound dull and lifeless. By rearranging or removing some of the absorbent furnishings, the tonal balance can be substantially improved. 4. If your music seems to be lacking in deep bass, move the speakers closer to the wall behind them and/or nearer to the corners of the listening room. Heavy. "booming" bass can be tamed by moving the speakers away from cor- ners or walls. In all cases, follow the placement guidelines outlined in Section 3 as closely as possible to assure a proper balance of reflected and direct sound. 5. Many problems with room acoustics can be solved by judicious use of the tone controls on your amplifier or receiver. Experiment with various settings to achieve a frequency balance that suits your personal tastes. 10. Maintenance The walnut-grain vinyl cabinetry of your 501 speakers can be cleaned by wiping with a soft damp cloth and a mild detergent. The grille panels require no special care although they can be carefully vacuumed if necessary. 11. In Case of Difficulty If you suspect a problem with your Bose 50f" speakers, use the following checklist to determine if the difficulty is actually in the speakers or in some other component of your music system. If one speaker sounds less brilliant than the other, try adjusting the positions of both Direct Energy Controls in accordance with the recommendations in Section 8. If one speaker sounds defective, do not switch the speaker cables. as this could damage a speaker. Disconnect the defective speaker at the amplifier output terminals and reconnect it to the amplifier channel that is operating correctly. If the speaker that sounded defective now plays properly, the problem is not in the speaker or wiring. If trouble appears in both speakers, connect them to another amplifier or receiver that is known to be working properly. If the speakers now operate correctly, the problem is not in the speakers. If trouble persists in one or both speakers, contact your authorized Bose dealer. He will verify any defects and arrange for service by an authorized service agency or by the Bose factory. Bose Corporation will make every effort to remedy any problem within the terms of the warranty at minimum inconvenience to you. 12. Technical Information Features Asymmetrical Design Direct Energy Control Dual Frequency" crossover network Efficient ducted-port enclosure system Automatic tweeter protection circuitry Thermal Protection System Syncomc II computerized quality control Driver complement: One (1) 10-inch (25.4 cm) longexcursion woofer, two (2) 3-inch (7.6 cm) tweeters Nominal Impedance: 8 ohms Crossover transition frequencies: 1.5 kHz and 2.5 kHz Power rating: 20 watts minimum,100 wafts RMS maximum per speaker Cabinet: Walnut-grain vinyl veneer. 24 x14lk x 1412/ inches (61x 36.8 x 36.2 cm) Covetedby patent rightsissted exlioipending 5%0ispeaker design* atradmnark or gone Corp:mien OCappighl1962 Bow Codxxatien. M rigks remwed. POPS inU.SA .1747Sr Better sound through research. Bose Corporation, The Mountain, Framingham. Massachusetts USA 01701 Australia, Belgium, Canada, Denmark, England, France, Germany, Greece, Ireland. Italy, Japan, Netherlands, Spain, Switzerland. 117796