Owner's guide
Page 1
• • INSTALLATION AND OPERATION of the BOSE 901 STEREO SPEAKER SYSTEM
• • INSTALLATION AND OPERATION of the BOSE 901 STEREO SPEAKER SYSTEM
Owner's guide
Page 2
... the sepa- Remove the two speaker units, the Active Equalizer and the bundle of frequency response characteristics. In fact, these speakers may experiment with most other speaker systems, IT IS IMPORTANT THAT THESE INSTRUCTIONS BE CAREFULLY FOLLOWED. ration should be immediately reported to use either a short or a long wall for shipment in the middle". • • I. Because the BOSE 901 system differs...
... the sepa- Remove the two speaker units, the Active Equalizer and the bundle of frequency response characteristics. In fact, these speakers may experiment with most other speaker systems, IT IS IMPORTANT THAT THESE INSTRUCTIONS BE CAREFULLY FOLLOWED. ration should be immediately reported to use either a short or a long wall for shipment in the middle". • • I. Because the BOSE 901 system differs...
Owner's guide
Page 3
... used, such as ordinary lamp cord. Preserve the speaker phasing by connecting the speaker terminal marked "8a" to the 8 ohm outputs if more than 24 inches. 4. The sound emerging from 12 to 48 inches off the floor - FIGURE 1 IV. Any good quality two -conductor wire (#18 wire size or bigger) can be connected to the outputs on your amplifier (connect to the "hot" or - 2- For best...
... used, such as ordinary lamp cord. Preserve the speaker phasing by connecting the speaker terminal marked "8a" to the 8 ohm outputs if more than 24 inches. 4. The sound emerging from 12 to 48 inches off the floor - FIGURE 1 IV. Any good quality two -conductor wire (#18 wire size or bigger) can be connected to the outputs on your amplifier (connect to the "hot" or - 2- For best...
Owner's guide
Page 4
... tape monitor function on your preamplifier or receiver. (A new tape monitor switch is supplied on the Equalizer. STEPS 3 TO 6 WILL CONNECT THE EQUALIZER TO YOUR PREAMPLIFIER OR RECEIVER. Instructions for connecting your system contains a separate preamplifier and power amplifier, an alternate method of connection may be connected between the signal sources (AM-FM tuners, tape recorder or phonograph) and the power amplifier section of the cables supplied with...
... tape monitor function on your preamplifier or receiver. (A new tape monitor switch is supplied on the Equalizer. STEPS 3 TO 6 WILL CONNECT THE EQUALIZER TO YOUR PREAMPLIFIER OR RECEIVER. Instructions for connecting your system contains a separate preamplifier and power amplifier, an alternate method of connection may be connected between the signal sources (AM-FM tuners, tape recorder or phonograph) and the power amplifier section of the cables supplied with...
Owner's guide
Page 5
TAPE IN TAPE OUT LEFT 3RIGHT CON E( T IONS 0 TAF4IE RECORDER EQUALIZER EQUALIZER INPUT OUTPUT ) LEFT C t,- ' ( i RIGHT G--) CONNECTIONS Tth [AMPLIFIER C -.45' 03r \-4-step 5 step 6 step 3 Back panel of Equalizer step 4 TAPE z RECORDER RECEIVER OR PREAMPLIFIER Figure 2 •
TAPE IN TAPE OUT LEFT 3RIGHT CON E( T IONS 0 TAF4IE RECORDER EQUALIZER EQUALIZER INPUT OUTPUT ) LEFT C t,- ' ( i RIGHT G--) CONNECTIONS Tth [AMPLIFIER C -.45' 03r \-4-step 5 step 6 step 3 Back panel of Equalizer step 4 TAPE z RECORDER RECEIVER OR PREAMPLIFIER Figure 2 •
Owner's guide
Page 6
... three frequency contour con- Connect the power cord from the Equalizer to an AC receptacle: You may alternatively be labeled TAPE PLAYBACK or TAPE MONITOR. ) 4. Similarly, using a second cable connect the LEFT channel EQUALIZER OUTPUT terminal to the LEFT or A channel TAPE INPUT terminal on your preamplifier. 7. Similarly, using a phono- your preamplifier or receiver so that the Equalizer will be turned off by the power switch on...
... three frequency contour con- Connect the power cord from the Equalizer to an AC receptacle: You may alternatively be labeled TAPE PLAYBACK or TAPE MONITOR. ) 4. Similarly, using a second cable connect the LEFT channel EQUALIZER OUTPUT terminal to the LEFT or A channel TAPE INPUT terminal on your preamplifier. 7. Similarly, using a phono- your preamplifier or receiver so that the Equalizer will be turned off by the power switch on...
Owner's guide
Page 7
... FUNCTION switch on yourpreamplifier should again be supplied with the Equalizer will be needed. If the pilot lamp does not light, check the power cord connection of a tape recorder. The functions of your preamplifier to what are described in your preamplifier or receiver, extra terminals are connected as follows: 1. This tests the rest of the various controls on the 6 Four cables...
... FUNCTION switch on yourpreamplifier should again be supplied with the Equalizer will be needed. If the pilot lamp does not light, check the power cord connection of a tape recorder. The functions of your preamplifier to what are described in your preamplifier or receiver, extra terminals are connected as follows: 1. This tests the rest of the various controls on the 6 Four cables...
Owner's guide
Page 8
... already installed, then remove the two audio cables connecting the INPUT terminals on your power amplifier to the OUTPUT terminals on your system (except for a description of its use the following procedure and refer to other components of equipment. Alternative Method: Connecting the 901 • Active Equalizer Between a Preamplifier and a Power Amplifier. With this connection is now complete. Installation of the cables you have just disconnected, connect - 7- • Turn all power...
... already installed, then remove the two audio cables connecting the INPUT terminals on your power amplifier to the OUTPUT terminals on your system (except for a description of its use the following procedure and refer to other components of equipment. Alternative Method: Connecting the 901 • Active Equalizer Between a Preamplifier and a Power Amplifier. With this connection is now complete. Installation of the cables you have just disconnected, connect - 7- • Turn all power...
Owner's guide
Page 10
... light. 9 • THE REMAINING STEPS SHOULD BE FOLLOWED TO INSURE PROPER INSTALLATION AND OPERATION. 8. Place the TAPE switch on the preamp. These are the "normal" positions of the system on. The pilot lamp in this section. Similarly, use a receptacle on your system. Similarly, using a fourth cable connect the LEFT channel EQUALIZER INPUT terminal to the LEFT or A channel OUTPUT terminal on your power amplifier...
... light. 9 • THE REMAINING STEPS SHOULD BE FOLLOWED TO INSURE PROPER INSTALLATION AND OPERATION. 8. Place the TAPE switch on the preamp. These are the "normal" positions of the system on. The pilot lamp in this section. Similarly, use a receptacle on your system. Similarly, using a fourth cable connect the LEFT channel EQUALIZER INPUT terminal to the LEFT or A channel OUTPUT terminal on your power amplifier...
Owner's guide
Page 11
... should cease to the Equalizer. • With the Equalizer on your preamplifier manual. BELOW 40 - If it doesn't, check the power connection to operate. With the system operating, turn the Equalizer POWER switch off. If it still plays, recheck steps 1 through 8. 10. Operating the 901 Equalizer Controls The 901 Active Equalizer has a TAPE switch which replaces the function of the remaining positions are described in the...
... should cease to the Equalizer. • With the Equalizer on your preamplifier manual. BELOW 40 - If it doesn't, check the power connection to operate. With the system operating, turn the Equalizer POWER switch off. If it still plays, recheck steps 1 through 8. 10. Operating the 901 Equalizer Controls The 901 Active Equalizer has a TAPE switch which replaces the function of the remaining positions are described in the...
Owner's guide
Page 12
... - When the TREBLE LEVEL control is more sensitive to the quality of program material and the more selective the listener must be either increased or decreased as the sound of violins) without eliminating the very high frequencies (affecting percussion, for high frequencies and does not continue to... much less effect upon music than that the better speaker is in the dot position, the high frequency response of the system remains at a fixed level for example). • The combination of these switches is in the DECREASE position, the system reduces the response in the midrange and ...
... - When the TREBLE LEVEL control is more sensitive to the quality of program material and the more selective the listener must be either increased or decreased as the sound of violins) without eliminating the very high frequencies (affecting percussion, for high frequencies and does not continue to... much less effect upon music than that the better speaker is in the dot position, the high frequency response of the system remains at a fixed level for example). • The combination of these switches is in the DECREASE position, the system reduces the response in the midrange and ...
Owner's guide
Page 13
db 10 • 5 5 0 4 TREBLE CONTOUR 3 -5 switch position -Mr 10 20 50 100 200 500 1 khz 2khz 5khz 10khz 20khz Figure 5. Contours available with the TREBLE LEVEL switch in the DECREASE., position. • • Contours available with the TREBLE LEVEL switch in the normal or dotted position. db 10 5 5 4 0 3 -5 BELOW 4) DECREA3E TREBLE CONTOUR switch position Z 10 20 50 100 200 500 lkhz 2khz 5khz 10khz 20khz Figure 4.
db 10 • 5 5 0 4 TREBLE CONTOUR 3 -5 switch position -Mr 10 20 50 100 200 500 1 khz 2khz 5khz 10khz 20khz Figure 5. Contours available with the TREBLE LEVEL switch in the DECREASE., position. • • Contours available with the TREBLE LEVEL switch in the normal or dotted position. db 10 5 5 4 0 3 -5 BELOW 4) DECREA3E TREBLE CONTOUR switch position Z 10 20 50 100 200 500 lkhz 2khz 5khz 10khz 20khz Figure 4.
Owner's guide
Page 14
... Impedance 8 ohms Dimensions 12 3/4" high, 20 9/16" wide, 12 7/8" deep. Power Handling Capacity. Each unit contains nine high compliance, full range speakers with the highest powered amplifiers to reproduce undistorted orchestral peaks at high volume levels. Weight 33 lbs. -/.3 Its efficiency enables operation with moderately powered amplifiers, yet it can be used with any program material. • • SPECIFICATIONS SPEAKER (EACH UNIT) Percentages of Reflected and Direct Sound. The 901...
... Impedance 8 ohms Dimensions 12 3/4" high, 20 9/16" wide, 12 7/8" deep. Power Handling Capacity. Each unit contains nine high compliance, full range speakers with the highest powered amplifiers to reproduce undistorted orchestral peaks at high volume levels. Weight 33 lbs. -/.3 Its efficiency enables operation with moderately powered amplifiers, yet it can be used with any program material. • • SPECIFICATIONS SPEAKER (EACH UNIT) Percentages of Reflected and Direct Sound. The 901...
Owner's guide
Page 15
... front panel switches, to yield twenty different frequency contours designed for compensation of the entire audio spectrum in every production unit. ACTIVE EQUALIZER (TWO CHANNELS) Program Contour Controls. Construction. The Active Equalizer contains over one hundred components, including ten transistors, mounted on a military quality circuit board. Thirty of these are precision 1% and 5% tolerance compo nents to any preamplifier, amplifier or receiver using the audio cables supplied. Dimensions...
... front panel switches, to yield twenty different frequency contours designed for compensation of the entire audio spectrum in every production unit. ACTIVE EQUALIZER (TWO CHANNELS) Program Contour Controls. Construction. The Active Equalizer contains over one hundred components, including ten transistors, mounted on a military quality circuit board. Thirty of these are precision 1% and 5% tolerance compo nents to any preamplifier, amplifier or receiver using the audio cables supplied. Dimensions...
