Owner's guide
Page 1
r • • ( ". • Owner's Manual .S SSS 901SERIESIII Direct/Reflecting® Speaker System :•• • .xl. 4;44'O4 V 4 ; rip 4 " CA? • '4'. '44 I Alt , '4 iFfa •fi. to' ;PN Nit 1•431 tr41:".f414 • • • l< •114/11 z ken.?
r • • ( ". • Owner's Manual .S SSS 901SERIESIII Direct/Reflecting® Speaker System :•• • .xl. 4;44'O4 V 4 ; 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
... Four-ChannelEquipment V. Speaker Placement C. Room Acoustics VII. The 901 Series III Loudspeaker System 4 A. Tape Recorders B. Headphones and Conventional Speakers VI. Voltage Conversion C. Care and Maintenance VIII. Unpacking Instructions 3 III. Technological Innovations IV. Installation 6 A. Adjusting Your Equalizer Controls B. Warranty 20 2 1976 13091: Corpcxelion Covered by patent rights issued and pending. • Living with your BOSE 901 Speakers 16 A. In Case...
... Four-ChannelEquipment V. Speaker Placement C. Room Acoustics VII. The 901 Series III Loudspeaker System 4 A. Tape Recorders B. Headphones and Conventional Speakers VI. Voltage Conversion C. Care and Maintenance VIII. Unpacking Instructions 3 III. Technological Innovations IV. Installation 6 A. Adjusting Your Equalizer Controls B. Warranty 20 2 1976 13091: Corpcxelion Covered by patent rights issued and pending. • Living with your BOSE 901 Speakers 16 A. In Case...
Owner's guide
Page 3
... use later. If either of bringing superb musical reproduction into the home. UnpackingInstructions The 901 Series III speaker system is installed, connected, and operated differently than conventional loudspeakers. Save the cartons and packing material for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. Introduction Thank you will experience is found in operation. nine full-range drivers...
... use later. If either of bringing superb musical reproduction into the home. UnpackingInstructions The 901 Series III speaker system is installed, connected, and operated differently than conventional loudspeakers. Save the cartons and packing material for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. Introduction Thank you will experience is found in operation. nine full-range drivers...
Owner's guide
Page 4
Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is designed to use your listening room walls to direct sound experienced in the larger environment of the speaker. Active Equalization The active equalizer electronically corrects for smoother, more controlled frequency response and ... reproduce every portion of total acoustic power at every frequency. 3. The New Full-Range High-Performance Driver In the 901 Series III driver, a combination of technological advances make possible its response in frequency response caused by steel frames) and improving precision...
Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is designed to use your listening room walls to direct sound experienced in the larger environment of the speaker. Active Equalization The active equalizer electronically corrects for smoother, more controlled frequency response and ... reproduce every portion of total acoustic power at every frequency. 3. The New Full-Range High-Performance Driver In the 901 Series III driver, a combination of technological advances make possible its response in frequency response caused by steel frames) and improving precision...
Owner's guide
Page 5
...and one for optimum performance characteristics. 3. permitting optimum speaker performance in combination with nine full-range matched drivers in a wide range of room positions (see SECTION VI). • Control of response of the 901 Series III is to work with the active equalizer. The Acoustic ...Matrix" Enclosure The enclosure of the speaker beyond the audible range. The purpose of the air columns is designed specifically to...
...and one for optimum performance characteristics. 3. permitting optimum speaker performance in combination with nine full-range matched drivers in a wide range of room positions (see SECTION VI). • Control of response of the 901 Series III is to work with the active equalizer. The Acoustic ...Matrix" Enclosure The enclosure of the speaker beyond the audible range. The purpose of the air columns is designed specifically to...
Owner's guide
Page 6
PLACING THE SPEAKERS Unlike conventional speakers, the 901 Series III functions with the speakers spaced apart 6' to 18" from the side of the "V" should be obtained with live performances. The basic idea is to provide space to allow the sound to the ceiling or floor restrict the reflected sound energy. 3. SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several...
PLACING THE SPEAKERS Unlike conventional speakers, the 901 Series III functions with the speakers spaced apart 6' to 18" from the side of the "V" should be obtained with live performances. The basic idea is to provide space to allow the sound to the ceiling or floor restrict the reflected sound energy. 3. SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several...
Owner's guide
Page 8
...Oc/IIS ol 9015, wire the speakers in Iles Illannef I tianuluctuted receivers or alValets wdl operate Iwo pairs of 90Is wins' in series Cailacl your power amplifier has too much resistance, audible coloration of the sound and loss of BOSE 901 loudspeakers. Installion B. sin/Willi, tattle...JaiICU IS legmrud a. Start with one conductor from the other), connect the "Part 1" speaker terminal marked "-" to your speaker system. Locate the "+" and "-" terminals on the bottom of 901 Series III loudspeakers are used, they Can be purchased without the equalizer These speakersare soldas ' add...
...Oc/IIS ol 9015, wire the speakers in Iles Illannef I tianuluctuted receivers or alValets wdl operate Iwo pairs of 90Is wins' in series Cailacl your power amplifier has too much resistance, audible coloration of the sound and loss of BOSE 901 loudspeakers. Installion B. sin/Willi, tattle...JaiICU IS legmrud a. Start with one conductor from the other), connect the "Part 1" speaker terminal marked "-" to your speaker system. Locate the "+" and "-" terminals on the bottom of 901 Series III loudspeakers are used, they Can be purchased without the equalizer These speakersare soldas ' add...
Owner's guide
Page 9
... fast-blow.3-ampfuse. BOSE Corporation recommends the use of the amplifier or receiver. Purchase fuseholders and the appropriate fast-acting fuses. • 4 • • • e. Connect the fuseholders in series with conventional amplifying equipment. Place the speaker marked "Part 2"... on the left channel output of a fast-acting fuse in series with the positive wire going to the terminal marked "pos." Connect the ...
... fast-blow.3-ampfuse. BOSE Corporation recommends the use of the amplifier or receiver. Purchase fuseholders and the appropriate fast-acting fuses. • 4 • • • e. Connect the fuseholders in series with conventional amplifying equipment. Place the speaker marked "Part 2"... on the left channel output of a fast-acting fuse in series with the positive wire going to the terminal marked "pos." Connect the ...
Owner's guide
Page 10
... high-fidelity system. we are unclear, it from your control amplifier. (Instructions in this is important because conventional speakers and headphones should realize that the equalizer will tell you have a tape recorder, disconnect it may also be due...REC OUT.) f. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. The equalizer can be used withvirtually allintegratedamplifiers,preamplifiers.and receivers.tUsingthe tapemonitorcircuit hastwoadvantages: When using the tape ...
... high-fidelity system. we are unclear, it from your control amplifier. (Instructions in this is important because conventional speakers and headphones should realize that the equalizer will tell you have a tape recorder, disconnect it may also be due...REC OUT.) f. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. The equalizer can be used withvirtually allintegratedamplifiers,preamplifiers.and receivers.tUsingthe tapemonitorcircuit hastwoadvantages: When using the tape ...
Owner's guide
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... connection of your control amplifier to the extreme left and right channels. (If the channels are reversed. NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE 901 SERIES I . Place the TAPE switch of your control amplifier and observe that the pilot light on the equalizer is not yet... panel). • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. A I AND II SPEAKER SYSTEMS. II Now, place the equalizer TAPE switch in the "dotted" or out position. Set the "BELOW 40" control in the NORMAL position...
... connection of your control amplifier to the extreme left and right channels. (If the channels are reversed. NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE 901 SERIES I . Place the TAPE switch of your control amplifier and observe that the pilot light on the equalizer is not yet... panel). • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. A I AND II SPEAKER SYSTEMS. II Now, place the equalizer TAPE switch in the "dotted" or out position. Set the "BELOW 40" control in the NORMAL position...
Owner's guide
Page 12
Using the Preamp-Out/Main-In Circuit An alternate method of connecting the BOSE Active Equalizer makes use with one or two tape recorders in the circuit; The disadvantage of this manner, it is permanently wired into the circuit.... Fiyur t: S PRE-AMPLIFIER • Installation 2. Also, system noise may prove inconvenient if you do connect the equalizer in this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of some receivers, the equalizer may not function if connected to the connection of your power...
Using the Preamp-Out/Main-In Circuit An alternate method of connecting the BOSE Active Equalizer makes use with one or two tape recorders in the circuit; The disadvantage of this manner, it is permanently wired into the circuit.... Fiyur t: S PRE-AMPLIFIER • Installation 2. Also, system noise may prove inconvenient if you do connect the equalizer in this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of some receivers, the equalizer may not function if connected to the connection of your power...
Owner's guide
Page 13
... is connected in connection jacks. Note: Due to match the 901 system when used , we suggest using conventional speakers with deep bass. If two pairs of the 901 Series III system, optimum performance is usually accomplished by Bose to the spatial and spectral properties of 901s are used, two active equalizers are required. For separate components, connect...
... is connected in connection jacks. Note: Due to match the 901 system when used , we suggest using conventional speakers with deep bass. If two pairs of the 901 Series III system, optimum performance is usually accomplished by Bose to the spatial and spectral properties of 901s are used, two active equalizers are required. For separate components, connect...
Owner's guide
Page 15
...to the unused tape monitor input connections of Tape Monitor 2 found on . place the TAPE MONITOR 2 switch of your BOSE dealer concerning the availability of "Y- t Any speaker systemother than thenosc 901III system NOTE: Contact your control amplifier on your control amplifier. 4. With the remaining output from each...then be connected directly to match the power response of your 901 equalizer in the monitor position (in the range below 100 Hz and above 4.000 Hz to your 901s. place the tape monitor of the 901 speakers. To play without using the TAPE MONITOR 1 circuit. 5....
...to the unused tape monitor input connections of Tape Monitor 2 found on . place the TAPE MONITOR 2 switch of your BOSE dealer concerning the availability of "Y- t Any speaker systemother than thenosc 901III system NOTE: Contact your control amplifier on your control amplifier. 4. With the remaining output from each...then be connected directly to match the power response of your 901 equalizer in the monitor position (in the range below 100 Hz and above 4.000 Hz to your 901s. place the tape monitor of the 901 speakers. To play without using the TAPE MONITOR 1 circuit. 5....
Owner's guide
Page 16
ADJUSTING YOUR EQUALIZER CONTROLS The 901 Series III equalizer has been completely redesigned with new control features, allowing greater flexibility in particular, the mid-bass region, which can be dramatically affected by ... and high-frequency variations in reducing turntable or record rumble. The perform- The BOSE 901 Series III Active Equalizer addresses this problem with different settings of the listening room-in operation and speaker placement. to 260-Hz range. Similarly, placing the speakers further away from 4.000 Hz to reduce the lowest octave of the treble control...
ADJUSTING YOUR EQUALIZER CONTROLS The 901 Series III equalizer has been completely redesigned with new control features, allowing greater flexibility in particular, the mid-bass region, which can be dramatically affected by ... and high-frequency variations in reducing turntable or record rumble. The perform- The BOSE 901 Series III Active Equalizer addresses this problem with different settings of the listening room-in operation and speaker placement. to 260-Hz range. Similarly, placing the speakers further away from 4.000 Hz to reduce the lowest octave of the treble control...
Owner's guide
Page 17
... adjust the sound for the 901 Series III and utilizes a four-hole mounting pattern. hard walls) can be attributed 10 walls of small children. instructions are possible regarding placement of support. Another placement idea is deep enough to provide the necessary distances behind and to suspend the speakers from your BOSE dealer and are encouraged...
... adjust the sound for the 901 Series III and utilizes a four-hole mounting pattern. hard walls) can be attributed 10 walls of small children. instructions are possible regarding placement of support. Another placement idea is deep enough to provide the necessary distances behind and to suspend the speakers from your BOSE dealer and are encouraged...
Owner's guide
Page 18
... quality equipment, the quality 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 250 watts rms per channel at 40... is connected in two cartons marked "Part 1" and "Pad 2." Percentages of speaker cabinet for maximum efficiency. 6. Speaker Configuration SPATIAL CHARACTERISTICS: Eight speakers reflecting sound at 8 ohms. 5. Twenty watts (in series. linear, high-excursion suspension; ENCLOSURE: Acoustic Matrix'", utilizing three Reactive Air Columns...
... quality equipment, the quality 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 250 watts rms per channel at 40... is connected in two cartons marked "Part 1" and "Pad 2." Percentages of speaker cabinet for maximum efficiency. 6. Speaker Configuration SPATIAL CHARACTERISTICS: Eight speakers reflecting sound at 8 ohms. 5. Twenty watts (in series. linear, high-excursion suspension; ENCLOSURE: Acoustic Matrix'", utilizing three Reactive Air Columns...
Owner's guide
Page 19
... suspect that the system operates properly with your 901s. • • B. 110-220 VAC VOLTAGE CONVERSION The BOSE Series III Equalizer is designed to another line voltage, contact the closest BOSE Authorized Factory Service Agency or the BOSE factory (The speakers require no care, although they may damage the speaker operating correctly. you turn the volume down or...
... suspect that the system operates properly with your 901s. • • B. 110-220 VAC VOLTAGE CONVERSION The BOSE Series III Equalizer is designed to another line voltage, contact the closest BOSE Authorized Factory Service Agency or the BOSE factory (The speakers require no care, although they may damage the speaker operating correctly. you turn the volume down or...