Owner's guide
Page 1
". • Owner's Manual .S SSS 901SERIESIII Direct/Reflecting® Speaker System :•• • .xl. 4;44'O4 V 4 ; r • • ( rip 4 " CA? • '4'. '44 I Alt , '4 iFfa •fi. to' ;PN Nit 1•431 tr41:".f414 • • • l< •114/11 z ken.?
". • Owner's Manual .S SSS 901SERIESIII Direct/Reflecting® Speaker System :•• • .xl. 4;44'O4 V 4 ; r • • ( rip 4 " CA? • '4'. '44 I Alt , '4 iFfa •fi. to' ;PN Nit 1•431 tr41:".f414 • • • l< •114/11 z ken.?
Owner's guide
Page 2
...Living with your BOSE 901 Speakers 16 A. Speaker Placement C. In Case of Contents I . Table of DifIiculty D. Wire Selection 2. Using the Preamp-Out/Main-In Circuit 4. Headphones and Conventional Speakers VI. Voltage Conversion C. Connecting the Speakers 1. Fusing C....Care and Maintenance VIII. Placing the Speakers B. Adjusting Your Equalizer Controls B. Warranty 20 2 1976 13091: Corpcxelion Covered by patent rights issued and pending. • Introduction 3 II. Unpacking Instructions 3 III. The 901 Series III Loudspeaker System 4 A. Design Features...
...Living with your BOSE 901 Speakers 16 A. Speaker Placement C. In Case of Contents I . Table of DifIiculty D. Wire Selection 2. Using the Preamp-Out/Main-In Circuit 4. Headphones and Conventional Speakers VI. Voltage Conversion C. Connecting the Speakers 1. Fusing C....Care and Maintenance VIII. Placing the Speakers B. Adjusting Your Equalizer Controls B. Warranty 20 2 1976 13091: Corpcxelion Covered by patent rights issued and pending. • Introduction 3 II. Unpacking Instructions 3 III. The 901 Series III Loudspeaker System 4 A. Design Features...
Owner's guide
Page 3
...for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. • I. II. do not place the damaged speaker(s) in the original carton with the complete packing material and notify your 901's. The listening enjoyment you will be rewarded with the "Part 1" speaker. PLEASE TAKE ... of many years of research dedicated to the art of the speakers has visible damage when unpacked. Unpack both cartons carefully. you for possible use later. UnpackingInstructions The 901 Series III speaker system is found in this manual are important. TheBOSE 901SeriesIII, ...
...for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. • I. II. do not place the damaged speaker(s) in the original carton with the complete packing material and notify your 901's. The listening enjoyment you will be rewarded with the "Part 1" speaker. PLEASE TAKE ... of many years of research dedicated to the art of the speakers has visible damage when unpacked. Unpack both cartons carefully. you for possible use later. UnpackingInstructions The 901 Series III speaker system is found in this manual are important. TheBOSE 901SeriesIII, ...
Owner's guide
Page 4
... balance of the speaker. every loudspeaker has many inherent resonances that required a 50 watt amplifier with the other drivers and becomes an insignificant 14 of the frequency spectrum in assembly. The New Full-Range High-Performance Driver In the 901 Series III driver, a combination...precision in correct balance; TECHNOLOGICAL INNOVATIONS 1. The combination of a live performance. 2. Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is designed to use your listening room walls to simulate the reflective properties of the much larger stage wall found behind the ...
... balance of the speaker. every loudspeaker has many inherent resonances that required a 50 watt amplifier with the other drivers and becomes an insignificant 14 of the frequency spectrum in assembly. The New Full-Range High-Performance Driver In the 901 Series III driver, a combination...precision in correct balance; TECHNOLOGICAL INNOVATIONS 1. The combination of a live performance. 2. Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is designed to use your listening room walls to simulate the reflective properties of the much larger stage wall found behind the ...
Owner's guide
Page 5
...four drivers on the rear panels). iati . 'sr 1/4" This precise contouring of response at each group of the 901 Series III is to provide reactiveairloadingtoreducethemotionrequiredof the driver cones at extremely low frequencies, thus allowing maximum efficiency with the active equalizer. ...8226; Additional control flexibility. The 901 Series III realizes additional advantages of active equalization with three new equalizer features: • More precise equalization of the speaker beyond the audible range. The New Active Equalizer The original 901 introduced the concept of the ...
...four drivers on the rear panels). iati . 'sr 1/4" This precise contouring of response at each group of the 901 Series III is to provide reactiveairloadingtoreducethemotionrequiredof the driver cones at extremely low frequencies, thus allowing maximum efficiency with the active equalizer. ...8226; Additional control flexibility. The 901 Series III realizes additional advantages of active equalization with three new equalizer features: • More precise equalization of the speaker beyond the audible range. The New Active Equalizer The original 901 introduced the concept of the ...
Owner's guide
Page 6
...will be placed al least 18" above the floor or below the ceiling (see Figure 1). PLACING THE SPEAKERS Unlike conventional speakers, the 901 Series III functions with the speakers placed between 12" and 24" from the side of the "V" should be between 12" to place ...are the rear face of your amplifying equipment, and 3) connecting the equalizer to develop around the speaker system. 1. SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for speaker placement. A. The angled grille panels found on the enclosure are 3' to 5'.) Large objects (such...
...will be placed al least 18" above the floor or below the ceiling (see Figure 1). PLACING THE SPEAKERS Unlike conventional speakers, the 901 Series III functions with the speakers placed between 12" and 24" from the side of the "V" should be between 12" to place ...are the rear face of your amplifying equipment, and 3) connecting the equalizer to develop around the speaker system. 1. SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for speaker placement. A. The angled grille panels found on the enclosure are 3' to 5'.) Large objects (such...
Owner's guide
Page 8
... ol 1 0 5 dlI I Niel a GA:Waled on the left channel amplifier output. (When connecting the 901 Series III loudspeakers to distinguish one equalizer is important that the amplifier connections for speaker connection. Place it on VIC Oast; Locate the "+" and "-" terminals on the left side of your receive/... be identified for 18-, 16-, and 14-gauge. "negative," or "minus" on the bottom of BOSE 901 loudspeakers. Installion B. Wire Selection If the wire used for both 901 speaker systems be identical (see Figure 3) so that each wire can result. Only one conductor from the other...
... ol 1 0 5 dlI I Niel a GA:Waled on the left channel amplifier output. (When connecting the 901 Series III loudspeakers to distinguish one equalizer is important that the amplifier connections for speaker connection. Place it on VIC Oast; Locate the "+" and "-" terminals on the left side of your receive/... be identified for 18-, 16-, and 14-gauge. "negative," or "minus" on the bottom of BOSE 901 loudspeakers. Installion B. Wire Selection If the wire used for both 901 speaker systems be identical (see Figure 3) so that each wire can result. Only one conductor from the other...
Owner's guide
Page 9
... Anyloudspeakerissubject todamageiftheamplifierpowering it should not be used with each speaker, placing the fuse in series with conventional amplifying equipment. or "plus" on the right side of a fast-acting fuse in an easily accessible location. f. BOSE Corporation recommends the use of the room and repeat the connection procedure for future electronic developments and should...
... Anyloudspeakerissubject todamageiftheamplifierpowering it should not be used with each speaker, placing the fuse in series with conventional amplifying equipment. or "plus" on the right side of a fast-acting fuse in an easily accessible location. f. BOSE Corporation recommends the use of the room and repeat the connection procedure for future electronic developments and should...
Owner's guide
Page 10
CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. this is important because conventional speakers and headphones should realize that the equalizer will tell you should not be used with the Active Equalizer. (See ...: When using the tape monitor connections of your control amplifier. (This terminal may be turned on your control amplifier so that the 901 equalizer is connected just like a tape recorder. • Connect the RIGHT channel INPUT connection to the RIGHT or "8" channel TAPE ...
CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. this is important because conventional speakers and headphones should realize that the equalizer will tell you should not be used with the Active Equalizer. (See ...: When using the tape monitor connections of your control amplifier. (This terminal may be turned on your control amplifier so that the 901 equalizer is connected just like a tape recorder. • Connect the RIGHT channel INPUT connection to the RIGHT or "8" channel TAPE ...
Owner's guide
Page 11
... this portion of the left and right to be corrected before proceeding further. as it is plugged into the system. recheck Steps "a" through "I AND II SPEAKER SYSTEMS. II If the sound does not return and the equalizer pilot light is not functioning at this point, please go back and check all... sound should now return. • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE...
... this portion of the left and right to be corrected before proceeding further. as it is plugged into the system. recheck Steps "a" through "I AND II SPEAKER SYSTEMS. II If the sound does not return and the equalizer pilot light is not functioning at this point, please go back and check all... sound should now return. • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE...
Owner's guide
Page 12
Using the Preamp-Out/Main-In Circuit An alternate method of connecting the BOSE Active Equalizer makes use of the preamplifier tapemonitor functions for use with one or two tape recorders in the circuit; Also,...TAPE RECORDER n CONNECTIONS R R 1 R L 0 0 0 0 0 0 aIMll - • MAIN-AMPLIFIER 12 L INPUT OUTPUT Fiyur t: S PRE-AMPLIFIER The disadvantage of this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of some receivers, the equalizer may prove inconvenient if you do connect the equalizer in this...
Using the Preamp-Out/Main-In Circuit An alternate method of connecting the BOSE Active Equalizer makes use of the preamplifier tapemonitor functions for use with one or two tape recorders in the circuit; Also,...TAPE RECORDER n CONNECTIONS R R 1 R L 0 0 0 0 0 0 aIMll - • MAIN-AMPLIFIER 12 L INPUT OUTPUT Fiyur t: S PRE-AMPLIFIER The disadvantage of this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of some receivers, the equalizer may prove inconvenient if you do connect the equalizer in this...
Owner's guide
Page 13
... require the reversal of the 901 Series III system, optimum performance is obtained when all four speaker systems are now connected to the receiver or amplifier in the conventional manner. If two pairs of connection. For this method of 901s are used, two active equalizers are not used with the BOSE 901's. use standard connection cables and...
... require the reversal of the 901 Series III system, optimum performance is obtained when all four speaker systems are now connected to the receiver or amplifier in the conventional manner. If two pairs of connection. For this method of 901s are used, two active equalizers are not used with the BOSE 901's. use standard connection cables and...
Owner's guide
Page 15
... 15 place the TAPE MONITOR 2 switch of your 901s. Your tape recorder will then be connected directly to your tape recorder. 2. CONNECTINGHEADPHONES ANDCONVENTIONAL SPEAKERS It is important to realize that the BOSE Active Equalizer introduces substantial boost in the circuit, will... "Y" connector as described in ) using the equalizer (for conventional speakers or headphones) and your BOSE dealer concerning the availability of your control amplifier. 4. place the tape monitor of "Y- t Any speaker systemother than thenosc 901III system NOTE: Contact your control amplifier has ...
... 15 place the TAPE MONITOR 2 switch of your 901s. Your tape recorder will then be connected directly to your tape recorder. 2. CONNECTINGHEADPHONES ANDCONVENTIONAL SPEAKERS It is important to realize that the BOSE Active Equalizer introduces substantial boost in the circuit, will... "Y" connector as described in ) using the equalizer (for conventional speakers or headphones) and your BOSE dealer concerning the availability of your control amplifier. 4. place the tape monitor of "Y- t Any speaker systemother than thenosc 901III system NOTE: Contact your control amplifier has ...
Owner's guide
Page 16
... redesigned with new control features, allowing greater flexibility in program material (see SECTION C). The "Below 40" switch can be dramatically affected by the speaker's placement. The BOSE 901 Series III Active Equalizer addresses this problem with your BOSE 901Speakers A. Reducing the mid-bass control will increase. BELOW 40 CONTROL. MID-BASS FREQUENCY CONTOUR CONTROL. If the...
... redesigned with new control features, allowing greater flexibility in program material (see SECTION C). The "Below 40" switch can be dramatically affected by the speaker's placement. The BOSE 901 Series III Active Equalizer addresses this problem with your BOSE 901Speakers A. Reducing the mid-bass control will increase. BELOW 40 CONTROL. MID-BASS FREQUENCY CONTOUR CONTROL. If the...
Owner's guide
Page 17
... can be improved by using decorative chains and hardware available from your BOSE dealer and are encouraged lo use your amplifier tone controls and equalizer controls to support the weight of the speaker system can be directed downward by your high-fidelity system. Finally, ...your listening room. doorway), or excessive window glass, which also serve to the side of the entire speaker systemalone. For acoustically "dead" rooms e.g., rooms with the pedestals for the 901 Series III and utilizes a four-hole mounting pattern. •te • B. Make certain the shelving is ...
... can be improved by using decorative chains and hardware available from your BOSE dealer and are encouraged lo use your amplifier tone controls and equalizer controls to support the weight of the speaker system can be directed downward by your high-fidelity system. Finally, ...your listening room. doorway), or excessive window glass, which also serve to the side of the entire speaker systemalone. For acoustically "dead" rooms e.g., rooms with the pedestals for the 901 Series III and utilizes a four-hole mounting pattern. •te • B. Make certain the shelving is ...
Owner's guide
Page 18
...difference being the maximum attainable volume. Percentages of the sound will remain the same over band from the wall behind the speaker: one speaker directed into the listening area to provide the optimumratio of reflected to 260Hz. ENCLOSURE: Acoustic Matrix'", utilizing three Reactive Air... of -± 2.5 dB above 4kHz. TAPE MONITOR SWITCH: Replaces tape monitor switch on receiver or amplifier when equalizer is packed in series. Shipping Weight: Part I 4ir 2. ers, utilizing aluminum helically wound voice coils; air columns emerge through rear of the reflected sound ...
...difference being the maximum attainable volume. Percentages of the sound will remain the same over band from the wall behind the speaker: one speaker directed into the listening area to provide the optimumratio of reflected to 260Hz. ENCLOSURE: Acoustic Matrix'", utilizing three Reactive Air... of -± 2.5 dB above 4kHz. TAPE MONITOR SWITCH: Replaces tape monitor switch on receiver or amplifier when equalizer is packed in series. Shipping Weight: Part I 4ir 2. ers, utilizing aluminum helically wound voice coils; air columns emerge through rear of the reflected sound ...
Owner's guide
Page 19
...901saredefective,andif so.what part of furniture polish used in the speaker wiring. it becomes necessary to convert your 901 system. If the trouble still persists, contact your 901s. CARE ANDMAINTENANCE Your 901 speaker cabinets and equalizer are operating at the amplifier output and reconnect... the amplifier. If you are not defective. • • B. 110-220 VAC VOLTAGE CONVERSION The BOSE Series III Equalizer is designed to operate on one speaker sounds defective, DO NOT switch the speaker cables, as this manual. The complete procedure for proper operation.
...901saredefective,andif so.what part of furniture polish used in the speaker wiring. it becomes necessary to convert your 901 system. If the trouble still persists, contact your 901s. CARE ANDMAINTENANCE Your 901 speaker cabinets and equalizer are operating at the amplifier output and reconnect... the amplifier. If you are not defective. • • B. 110-220 VAC VOLTAGE CONVERSION The BOSE Series III Equalizer is designed to operate on one speaker sounds defective, DO NOT switch the speaker cables, as this manual. The complete procedure for proper operation.