Bose 501 Series III Loud Owner's guide - Page 2

Thetose 5O1TM Series III Direct/Reflecting' Altdspeaker System • 1. Introduction Thank you for purchasing the Bose 501 Series Ill Direct/ Reflecting' Loudspeaker System. Its advanced design and quality construction will give youmany years of listening pleasure. The installation and operating principles of your Bose 501 system are significantly different from those of conventional speaker systems. To obtain the best possible performance, please take the time to read this manual. 2. Unpacking Your 501 system is packaged in two separate cartons marked Part1(left speaker) and Part 2 (right speaker). Unpack each unit carefully, saving the cartons and all packaging materials for later use. If either speaker appears to be damaged when unpacking, do not place the damaged unit into operation. Repack the speaker in its original carton and notify your authorized l ee dealer inmediately. 3. Placement Bose 501 speakers are designed for flexible placement in a wide variety of listening environments. For optimum results. follow the placement recommendations listed below. Refer to Figure1. 1. Place the Part1and Part 2 speakers on the lett and right sides of the room respectively, spaced 4 to 12 feet (1.2-3.6 rn) apart. 2. The most accurate bass response is realized when the speakers are set directly against the wall behind them. However, satisfactory performance can still be obtained with the speakerslocated up to12 inches (30 cm) away from the rear wall. 3. Position the speakers at least 18 inches (45 cm) from the side walls. Optimum distance is 2 to 5 feet (0.6-1.5 m). Large obteels (furniture, etc.) should not be placed in front of the speakers. 5 2-5 feet w t (0 6-1 5m) 0 th" REAR WALL 10-12 inches (0-30 cm) 4-12 feet (1.2-3.6 m) • Part 1 Left Speaker m S / Part 2 Right Speaker Figure 1. Recommended placement in average-sized listening rooms. 4. A large proportion of the sound energy radiated by your 501 system comes through the sides of the enclosures. For this reason. It is important not to block or cover the side grille panels. Always allow at least 18 inches (45 cm) of clear space around both sides of the speaker cabinets. 5. Sound-absorbent furnishings (stuffed chairs. heavy drapes, etc.) should be kept at least 2 feet (60 cm) away from the speakers. 4. Wire Selection It the wire connecting the speakers to your amplifier or receiver is too small, audible coloration of the sound and/or power loss can occur. The table below specifies the minimum thickness of 2-conductor wire recommended for various speaker-to-amp distances. Standard 2-conductor zipcord (available at electrical and hardware stores) can be used for speaker connection. This wire is often color-coded, or else has a ribbed line(s) running along one conductor for easy identification of the positive and negative leads. RECOMMENDED WIRE SIZES* Maximum Length Wire Gauge 30 feet ( 9m) 18(0.75 mm2) 45 feet (14m) 16 (1.5mm2) 70 feet (21m) 14 (2.0 mmz) *Based on amaximum frequency response deviationoil: 0.5de 5. Connection Follow the next procedure to assure that both 501' speakers are properly connected to your music system. Refer to Figure 2. 1. Turn off your amplifier or receiver and unplug it from the ac power mains before attempting to connect the loudspeakers. 2. Slightly separate the conductors at the ends of each length of wire. Strip approximately t/2 inch (12 mm) of insulation off each conductor.