Bose 90 manual

The Bose ® 901 ® Series VI Direct/Reflecting ® Speaker System Owner’ s Guide[...]

2 WA R NING: To r educe the risk of fir e or electric shock, do not expose the system to rain or moistur e. CAUTION These CAUTION marks ar e located on the bottom of your 901 ® active equalizer: The lightning flash with ar r owhead symbol, within an equilateral triangle, is intended to aler t the user to the presence of uninsulated dangerous volta[...]

3 Contents Where to find… Contents Where to find… ............................................................................................................. 3 Warranty period ............................................................................................................ 3 Customer service ........................................[...]

4 Setting Up Befor e you begin Thank you for purchasing the Bose ® 901 ® Series VI Direct/Reflecting ® speakers. They repr e- sent the best in Bose Corporation speaker design and engineering and will give you many years of listening pleasur e. The installation and operating principles of this system ar e significantly differ ent from those of co[...]

5 Setting Up System Compatibility Bose ® 901 ® Series VI speakers and Series VI active equalizer work with your ster eo components to produce a superb music system. The active equalizer is an integral par t of the system and may be connected in a variety of ways, depending on the components you have. The two most common methods ar e described in [...]

6 Setting Up Choosing the location for your speakers Choose locations for your 901 ® speakers that use the walls to best advantage by reflecting sound throughout the listening r oom. Refer to the drawing on page 7. Guidelines for placement Place the speakers along the same wall (see Figur e 3): •4 to 12 feet (1.2 – 3.6 m) apart, with the V -sh[...]

7 Setting Up Har dware needed for ceiling suspension • Screw hooks support the chains at the ceiling. They must have at least a #10 wood thread with a shank diameter of at least 3 ⁄ 16 inch (4.5 mm). They should be long enough to go through any plasterboar d and still have at least one inch (25 mm) of thread left to penetrate a wood beam. For a[...]

8 Setting Up Speaker connections With your speakers in their chosen locations, connect them to the r eceiver . Choosing the wir e It is important to use the right thickness of speaker wire. For distances of up to 30 feet (9 m), 18 gauge (.075 mm 2 ) 2-conductor wire works well. For distances gr eater than 30 feet (9 m), r efer to the wire r ecommen[...]

9 Setting Up Checking the speaker connections Make sure the terminal knurled nut is tightened down fir mly . Any gap between the wir e and terminal can cause heat build up. Check to be sur e the wires ar e connected positive to positive (+ to +) and negative to negative (- to -). Make sure no loose strands of wir e touch across ter minals, which ca[...]

10 Setting Up 3. Connect one end of a cable to the AMPLIFIER INPUT jacks on the 901 ® active equalizer . a. Insert the first connector firmly into the INPUT jack marked R. b. Insert the second connector into the INPUT jack marked L. 4. Connect the other end of the cable to the OUT or RECORD jacks on your r eceiver . These jacks may be marked TO IN[...]

11 Setting Up 2. Use the twin cable assemblies (with two connectors at each end) that ar e supplied with the equalizer . Use one connector for the right (R) channel connections and the other connector for the left (L) channel connections. 3. Connect the amplifier INPUT of the Bose ® 901 ® active equalizer to the PRE AMP OUT jacks of the receiver [...]

12 Setting Up T esting the speakers and equalizer Choose the test method appropriate to your system: To test the T APE MONITOR connection 1. T urn off or disconnect any non-901 speakers or headphones that may be connected. 2. On the 901 ® active equalizer , press the MONITOR button IN to T APE, and the BASS button OUT to position 1. 3. Set the MID[...]

13 Setting Up 5. Move the receiver BALANCE contr ol to the extreme left and then to the extreme right. This tests the left and right channel orientation. If the channels are r eversed, check the connections. 6. T ur n off the r eceiver and temporarily unplug the 901 ® active equalizer fr om its AC (mains) power outlet. 7. T ur n your r eceiver bac[...]

14 Playing your speakers Always use the 901 ® active equalizer when playing your 901 speakers. How you set the equalizer depends on how it is connected to your r eceiver . When connected to T APE MONITOR Press your r eceiver T APE MONITOR button to the IN or MONITOR position. This switches the equalizer into the system. Check periodically to be su[...]

15 Using Y our 901 ® Series VI Speaker System Adjusting the sound Adjust the sound using the MID-TREBLE and MID-BASS sliders and BASS contr ol on the 901 ® active equalizer . Use the tone controls on your r eceiver only after the MID-TREBLE and MID-BASS sliders have been set accor ding to the procedur es below . Using the MID-TREBLE and MID-BASS [...]

16 Using Y our 901 ® Series VI Speaker System Equalizer compatibility The Bose ® 901 ® Series VI active equalizer is designed for specific use with Bose 901 Series VI speakers. It may also be used with 901 Series V speakers. WA RNING: Bose 901 Series I, II, III, or IV speakers r equire a substantially differ ent equalization. The 901 Series VI a[...]

17 Maintaining Y our 901 ® Series VI Speaker System Cleaning your speakers If your 901 ® speakers have a painted surface, clean with a soft damp cloth. If necessary , use a mild deter gent such as dish soap. If the speakers have a wood veneer finish, clean them with wood furniture polish. Y ou may vacuum the speaker grille panels carefully , if n[...]

18 Product Information 901 Series VI active equalizer Input Impedance 47 k ohms (47 k Ω ) Output Impedance 1 k ohm Usable dynamic range 106 dB @ 35 Hz Noise (A-weighted) Greater than 90 dB below 1 volt Distortion Less than 0.09% THD at 1 kHz, 1 V input Compensation contr ols Mid-Bass, ± 6 dB @ 225 Hz Mid-T reble, ± 6 dB @ 3 kHz Bass Switch – [...]

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