Owner's guide
Page 2
... Circuit) 2. Connecting Headphones or Conventional Speakers Getting The Most Out of Your 901s A. II. IV. VI. Fusing Your 901 Speakers C. Connecting The Equalizer 1. Alternate Method II (Using separate PREAMPLIFIER and POWER AMPLIFIER) 4. Adjusting The Equalizer Controls C. The Only System Better Than A Pair of 901s In Case of Difficulty Technical Information Accessories and Options Five Year Warranty Page...
... Circuit) 2. Connecting Headphones or Conventional Speakers Getting The Most Out of Your 901s A. II. IV. VI. Fusing Your 901 Speakers C. Connecting The Equalizer 1. Alternate Method II (Using separate PREAMPLIFIER and POWER AMPLIFIER) 4. Adjusting The Equalizer Controls C. The Only System Better Than A Pair of 901s In Case of Difficulty Technical Information Accessories and Options Five Year Warranty Page...
Owner's guide
Page 3
... THIS MANUAL, as wood. To obtain the full performance of the 901's unique design. II. Repack the speakers and the Equalizer in operation. You will obtain the full benefits of the 901, you unpack them, do not place the system in the original cartons...purchasing the BOSE 901 Series 31Direct/Reflecting r speaker system. UNPACKING YOUR 9O1s The 901 speaker system is the only way you for possible use later.) If either the speakers or the Equalizer are important. The superior dispersion characteristics of the 901 allow considerable freedom of the 901. The listening...
... THIS MANUAL, as wood. To obtain the full performance of the 901's unique design. II. Repack the speakers and the Equalizer in operation. You will obtain the full benefits of the 901, you unpack them, do not place the system in the original cartons...purchasing the BOSE 901 Series 31Direct/Reflecting r speaker system. UNPACKING YOUR 9O1s The 901 speaker system is the only way you for possible use later.) If either the speakers or the Equalizer are important. The superior dispersion characteristics of the 901 allow considerable freedom of the 901. The listening...
Owner's guide
Page 5
... ( -41 If stranded wire is a choice of your receiver or amplifier output. The fuse should be used. (See Section IV E.) 3. CONNECTING THE EQUALIZER THIS PART OF THE INSTALLATION DIFFERS FROM THAT OF CONVENTIONAL SPEAKER SYSTEMS. BE CERTAIN TO FOLLOW THE INSTRUCTIONS GIVEN BELOW, STEP BY STEP. 1. Because of... output of your amplifier or receiver. (If there is used for convenience. (For two pairs of the two wires in series with either of BOSE 901s. Also make certain that the loose strands do not touch or short•out the speaker or amplifier terminals. FUSING YOUR...
... ( -41 If stranded wire is a choice of your receiver or amplifier output. The fuse should be used. (See Section IV E.) 3. CONNECTING THE EQUALIZER THIS PART OF THE INSTALLATION DIFFERS FROM THAT OF CONVENTIONAL SPEAKER SYSTEMS. BE CERTAIN TO FOLLOW THE INSTRUCTIONS GIVEN BELOW, STEP BY STEP. 1. Because of... output of your amplifier or receiver. (If there is used for convenience. (For two pairs of the two wires in series with either of BOSE 901s. Also make certain that the loose strands do not touch or short•out the speaker or amplifier terminals. FUSING YOUR...
Owner's guide
Page 6
...control amplifier. g. Consult your control amplifier. (This terminal may be labeled TAPE OUT or REC OUT.) f. Remember that the Equalizer will automatically be switched on or off all power to a switched outlet of the cables supplied with virtually all integrated amplifiers, ...tape monitor circuits. The connection method described in the next section will call these various components the "control amplifier." b. The 901 Equalizer is normally connected to the tape monitor circuit. d. receive:, or preamplifier instructions and refer to the section describing steps for...
...control amplifier. g. Consult your control amplifier. (This terminal may be labeled TAPE OUT or REC OUT.) f. Remember that the Equalizer will automatically be switched on or off all power to a switched outlet of the cables supplied with virtually all integrated amplifiers, ...tape monitor circuits. The connection method described in the next section will call these various components the "control amplifier." b. The 901 Equalizer is normally connected to the tape monitor circuit. d. receive:, or preamplifier instructions and refer to the section describing steps for...
Owner's guide
Page 7
... a tape recorder, its connection to the system will no longer be left in . m. n. If the sound does not return, and the Equalizer pilot light is operating properly. These are the "NORMAL" positions of your integrated amplifier, receiver, or preamplifier to make certain it is on the... switch in Section III D. • 7 Since the system will be playing and the Equalizer pilot light will be unaware that they coincide with certain musical selections, for correct placement of the 901 system is now complete, and the system is still in the circuit. Turn the entire system...
... a tape recorder, its connection to the system will no longer be left in . m. n. If the sound does not return, and the Equalizer pilot light is operating properly. These are the "NORMAL" positions of your integrated amplifier, receiver, or preamplifier to make certain it is on the... switch in Section III D. • 7 Since the system will be playing and the Equalizer pilot light will be unaware that they coincide with certain musical selections, for correct placement of the 901 system is now complete, and the system is still in the circuit. Turn the entire system...
Owner's guide
Page 8
...this method of connection is that it P: I ILL:?:117, 0 FIG. 4 An alternate method of connecting the BOSE Active Equalizer makes use an additional pair of their receivers or integrated amplifiers. The advantage of this method of the receiver or ... manner. ALTERNATE METHOD I ., •1..3 r , ,, Viz .1.1 IlreCK 1, 0 OaL•40 ninCen Saw/ 0 0 i ...co.. S 3. ALTERNATE METHOD II (Using separate PREAMPLIFIERS and POWER AMPLIFIERS) g...g 2sts7,--t a .(113•.... -77:L.'S ....,g17,7 in the circuit. Tape re- 2. One disadvantage of this method of...
...this method of connection is that it P: I ILL:?:117, 0 FIG. 4 An alternate method of connecting the BOSE Active Equalizer makes use an additional pair of their receivers or integrated amplifiers. The advantage of this method of the receiver or ... manner. ALTERNATE METHOD I ., •1..3 r , ,, Viz .1.1 IlreCK 1, 0 OaL•40 ninCen Saw/ 0 0 i ...co.. S 3. ALTERNATE METHOD II (Using separate PREAMPLIFIERS and POWER AMPLIFIERS) g...g 2sts7,--t a .(113•.... -77:L.'S ....,g17,7 in the circuit. Tape re- 2. One disadvantage of this method of...
Owner's guide
Page 9
... been connected to what are normally the tape recorder terminals of the amplifier channels powering the 901 speakers. d. c. Installation of a tape recorder. connecting the Equalizer in the MONITOR position (down). Since the BOSE Active Equalizer must be connected before the final stage of amplifica• tion of your control amplifier. 9 4. Similarly, connect the LEFT...
... been connected to what are normally the tape recorder terminals of the amplifier channels powering the 901 speakers. d. c. Installation of a tape recorder. connecting the Equalizer in the MONITOR position (down). Since the BOSE Active Equalizer must be connected before the final stage of amplifica• tion of your control amplifier. 9 4. Similarly, connect the LEFT...
Owner's guide
Page 10
... BE DAMAGED BY PLAYING WITH THE BOSE 901 EQUALIZER CONNECTED IN THE CIRCUIT. If the image of the sound is important to be moved no farther apart than 18 inches from the floor, ceiling, or side walls. Moving the vee (the back of the 901) of the system; Do not ... to or farther from the wall than 8 inches. The frequency response in the mid-bass range. The dispersion of the music is recommended that the BOSE 901 Active Equalizer introduces substantial boost in the same way by moving the speakers closer to the wall than 4 feet. / / / / /I / FIG. 7 10 If ...
... BE DAMAGED BY PLAYING WITH THE BOSE 901 EQUALIZER CONNECTED IN THE CIRCUIT. If the image of the sound is important to be moved no farther apart than 18 inches from the floor, ceiling, or side walls. Moving the vee (the back of the 901) of the system; Do not ... to or farther from the wall than 8 inches. The frequency response in the mid-bass range. The dispersion of the music is recommended that the BOSE 901 Active Equalizer introduces substantial boost in the same way by moving the speakers closer to the wall than 4 feet. / / / / /I / FIG. 7 10 If ...
Owner's guide
Page 11
... screwed into an adjacent room. (See Fig. 7.1 The 901s also can be placed no closer than 18 inches from the ceiling. ADJUSTING THE EQUALIZER CONTROLS 901 ACTIVE EQUALIZER • rm.! The first Equalizer control is to adjust the Equalizer controls. This control is effective also in this is readily ...10.0* 10 • lliGn *PLO • w M0MITOPI CONT01.1* 0(CREASC BELOW 40 FIG. 8 Another way of altering the performance of the 901 system is labeled BELOW 40. If distortion occurs when you prefer to suspend the speakers far above the listening area in a high ceiling room, ...
... screwed into an adjacent room. (See Fig. 7.1 The 901s also can be placed no closer than 18 inches from the ceiling. ADJUSTING THE EQUALIZER CONTROLS 901 ACTIVE EQUALIZER • rm.! The first Equalizer control is to adjust the Equalizer controls. This control is effective also in this is readily ...10.0* 10 • lliGn *PLO • w M0MITOPI CONT01.1* 0(CREASC BELOW 40 FIG. 8 Another way of altering the performance of the 901 system is labeled BELOW 40. If distortion occurs when you prefer to suspend the speakers far above the listening area in a high ceiling room, ...
Owner's guide
Page 12
... IAN(' SmTCH ITOS.I 10.000 N--- 20K FIG. 10 HIGH FREQUENCY The next frequency control of the 901 Equalizer is moved to the recording you 12 FREQUENCY RESPONSE CONTOURS OF THE 805E 901 SERIES ii ACTIVE EOt/RuZER WITH THE miG. This control has 5 positions. ALL SW'TC"CS 'N EH( ... \-/ 20 50 100 500 1.000 5.000 I .0% -----\ 5 -., 4\ • 2 -----"j il Of Lex 40 CONTowi FREQUENCY RESPONSE CONTOUR OF THE 805E 901 SERIES ii ACTIVE COIJALIZER WITH THE HIGH FREOUENCV SWITCH IN THE NORMAL POSITION 20 I50 100 500 1,000 5.000 10.000 20K FIG. 9 ECIVALIZI• PERSONS( IN...
... IAN(' SmTCH ITOS.I 10.000 N--- 20K FIG. 10 HIGH FREQUENCY The next frequency control of the 901 Equalizer is moved to the recording you 12 FREQUENCY RESPONSE CONTOURS OF THE 805E 901 SERIES ii ACTIVE EOt/RuZER WITH THE miG. This control has 5 positions. ALL SW'TC"CS 'N EH( ... \-/ 20 50 100 500 1.000 5.000 I .0% -----\ 5 -., 4\ • 2 -----"j il Of Lex 40 CONTowi FREQUENCY RESPONSE CONTOUR OF THE 805E 901 SERIES ii ACTIVE COIJALIZER WITH THE HIGH FREOUENCV SWITCH IN THE NORMAL POSITION 20 I50 100 500 1,000 5.000 10.000 20K FIG. 9 ECIVALIZI• PERSONS( IN...
Owner's guide
Page 14
... speaker sounds defective, switch the left speaker. Be certain that all cables are connected properly and that there is a problem with the Equalizer out of the circuit. VI. TECHNICAL INFORMATION A. IN CASE OF DIFFICULTY If you suspect that the cables are returned freight collect to ... part of your 901s are probably overloading the amplifier. Authorized Service Agency or at the BOSE Factory without the Equal. you return only that you should connect each pair of speakers to the 4 OHM terminals of the system which is packed in this reason, the BOSE 901 is not required...
... speaker sounds defective, switch the left speaker. Be certain that all cables are connected properly and that there is a problem with the Equalizer out of the circuit. VI. TECHNICAL INFORMATION A. IN CASE OF DIFFICULTY If you suspect that the cables are returned freight collect to ... part of your 901s are probably overloading the amplifier. Authorized Service Agency or at the BOSE Factory without the Equal. you return only that you should connect each pair of speakers to the 4 OHM terminals of the system which is packed in this reason, the BOSE 901 is not required...
Owner's guide
Page 15
... facings, to eliminate audible resonances. VII. • ACCESSORIES AND OPTIONS WALNUT FACINGS The BOSE 901 is available with a damping factor of 40 or higher meets the requirements of the 901. (The wire size recommendations of Table 1 on each ceramic magnet: 9.6 ounces G. ...either white. Driver Complement Each unit contains 9 high-compliance full•range drivers with the 901 Continental. The Speaker Dimensions: 20-9/16" W x 12-3/4" H x 12-7/8" D Weight: 33 pounds Nominal Impedance: 8 ohms C. The Active Equalizer Dimensions: 2.13/16" H x 9.1/4" W x 63/4" 0 Input Impedance: 150k ...
... facings, to eliminate audible resonances. VII. • ACCESSORIES AND OPTIONS WALNUT FACINGS The BOSE 901 is available with a damping factor of 40 or higher meets the requirements of the 901. (The wire size recommendations of Table 1 on each ceramic magnet: 9.6 ounces G. ...either white. Driver Complement Each unit contains 9 high-compliance full•range drivers with the 901 Continental. The Speaker Dimensions: 20-9/16" W x 12-3/4" H x 12-7/8" D Weight: 33 pounds Nominal Impedance: 8 ohms C. The Active Equalizer Dimensions: 2.13/16" H x 9.1/4" W x 63/4" 0 Input Impedance: 150k ...