Owner's guide
Page 2
... Conroe:Vic Benwcer the Franc and the Arnolifiei? 3. Connecting Other Equipment 12 A. In Case of Contents I. Placing the Speakers B. PhasirgINHng 3. Fusing C. Technical Information 17 A. Voltage Conversion C. Care and Maintenance VII. Introduction 3 II. Source and ... Instructions 3 III. Installation 4 A. Connecting the Equalizer 1. Using the Tape Monitor Circuit 2. Using 1-cur-Chanre IV. Headphones and Conventional Speakers V. Living with your BOSE 901 Speakers 14 A. Speaker Placement D. Room Acoustics VI. Warranty 19 r..; '978 DOSE Ccrpo•aticn.
... Conroe:Vic Benwcer the Franc and the Arnolifiei? 3. Connecting Other Equipment 12 A. In Case of Contents I. Placing the Speakers B. PhasirgINHng 3. Fusing C. Technical Information 17 A. Voltage Conversion C. Care and Maintenance VII. Introduction 3 II. Source and ... Instructions 3 III. Installation 4 A. Connecting the Equalizer 1. Using the Tape Monitor Circuit 2. Using 1-cur-Chanre IV. Headphones and Conventional Speakers V. Living with your BOSE 901 Speakers 14 A. Speaker Placement D. Room Acoustics VI. Warranty 19 r..; '978 DOSE Ccrpo•aticn.
Owner's guide
Page 3
... marked "Part 1" and Part 2." Unpack both cartons carefully. Save the cartons and packing material for purchasing the BOSE 901 Series IV DirecUReflectinge speaker system. II. If either of bringing superb musical reproduction into the home. The active equalizer is installed, connected...you will be rewarded with the "Part 1" speaker. PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY. The BOSE 901 Series IV, with the complete packing material and notify your 901 speakers. Unpacking Instructions The 901 Series IV speaker system is the culmination of many years of ...
... marked "Part 1" and Part 2." Unpack both cartons carefully. Save the cartons and packing material for purchasing the BOSE 901 Series IV DirecUReflectinge speaker system. II. If either of bringing superb musical reproduction into the home. The active equalizer is installed, connected...you will be rewarded with the "Part 1" speaker. PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY. The BOSE 901 Series IV, with the complete packing material and notify your 901 speakers. Unpacking Instructions The 901 Series IV speaker system is the culmination of many years of ...
Owner's guide
Page 4
...side of the "V" should be obtained under a wide variety of the larger environments associated with a live performance. Installation Your 901 Series IV speaker system consists of placement and produces an unusually large "best I III. gszw , "R•TC-C:tr6.6--."f6ce,":,,6:6;tiza, REFLECTING WALL... the 901 speaker (see Figure 1). Outstanding performance can be at least 18" from the reflecting wall. 2. The angled grille panels found on the enclosure are 3' to place your speakers and would like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides...
...side of the "V" should be obtained under a wide variety of the larger environments associated with a live performance. Installation Your 901 Series IV speaker system consists of placement and produces an unusually large "best I III. gszw , "R•TC-C:tr6.6--."f6ce,":,,6:6;tiza, REFLECTING WALL... the 901 speaker (see Figure 1). Outstanding performance can be at least 18" from the reflecting wall. 2. The angled grille panels found on the enclosure are 3' to place your speakers and would like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides...
Owner's guide
Page 6
...BOSE 901 loudspeakers. Following the guidelines provided, the most electrical and hardware stores, can be used.)11- Phasing/Wiring It is intended for proper phasing of impedances on " pairs and can result. Using the speaker wire (which is not capable of 4-ohm Operation with one side of 901s. If two pairs of 901 Series IV...amplifier output. (When connecting the 901 Series IV loudspeakers to your receiver or amplifier is marked to speaker connection. The table below summarizes maximum wire lengths for both speakers work together (in series. However, if your equipment. ...
...BOSE 901 loudspeakers. Following the guidelines provided, the most electrical and hardware stores, can be used.)11- Phasing/Wiring It is intended for proper phasing of impedances on " pairs and can result. Using the speaker wire (which is not capable of 4-ohm Operation with one side of 901s. If two pairs of 901 Series IV...amplifier output. (When connecting the 901 Series IV loudspeakers to your receiver or amplifier is marked to speaker connection. The table below summarizes maximum wire lengths for both speakers work together (in series. However, if your equipment. ...
Owner's guide
Page 7
...the amplifier powering it should be obtained from BOSE Customer Service Department for $5.00. Be sure to each speaker, placing the fuse in SECTION 3. 3. BOSE Corporation recommends use of a 3ampere, fast-acting Buss AGC Series or Littelfuse AG Series. Ask for the right amplifier channel. Connect... the fuseholders in series with the positive wire going to place ...
...the amplifier powering it should be obtained from BOSE Customer Service Department for $5.00. Be sure to each speaker, placing the fuse in SECTION 3. 3. BOSE Corporation recommends use of a 3ampere, fast-acting Buss AGC Series or Littelfuse AG Series. Ask for the right amplifier channel. Connect... the fuseholders in series with the positive wire going to place ...
Owner's guide
Page 8
Installation C. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. NOTE: Check your control equipment to the following instructions: a. The equalizer can be used with the power switch of...off the tape monitor switch on or off all of your control amplifier; g. Consult your high-fidelity system. this is important because conventional speakers and headphones should realize that the equalizer will tell you have a tape recorder, disconnect it were a tape recorder, using this section ...
Installation C. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. NOTE: Check your control equipment to the following instructions: a. The equalizer can be used with the power switch of...off the tape monitor switch on or off all of your control amplifier; g. Consult your high-fidelity system. this is important because conventional speakers and headphones should realize that the equalizer will tell you have a tape recorder, disconnect it were a tape recorder, using this section ...
Owner's guide
Page 9
... of the left and right channels. (If the channels are reversed, check your control amplifier in the MONITOR position. I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 j. plifier and observe that the equalizer is probably connected incorrectly. Now, place the equalizer TAPE switch in the "out...
... of the left and right channels. (If the channels are reversed, check your control amplifier in the MONITOR position. I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 j. plifier and observe that the equalizer is probably connected incorrectly. Now, place the equalizer TAPE switch in the "out...
Owner's guide
Page 10
Using the Preamp•Out/Main-ln Circuit An alternate method of connecting the BOSE Active Equalizer makes use of the preamplifier tape monitor functions for further recommendations). 3. This connection method provides complete flexibility of the ...ISIIINMWRIM/0 R OUTPUT Figure 5 PREAMPLIFIER The disadvantage of this manner, it is permanently wired into the circuit. (See SECTION IV.) If you are using conventional speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of some receivers, the equalizer may increase slightly due to these jacks. Also, system ...
Using the Preamp•Out/Main-ln Circuit An alternate method of connecting the BOSE Active Equalizer makes use of the preamplifier tape monitor functions for further recommendations). 3. This connection method provides complete flexibility of the ...ISIIINMWRIM/0 R OUTPUT Figure 5 PREAMPLIFIER The disadvantage of this manner, it is permanently wired into the circuit. (See SECTION IV.) If you are using conventional speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of some receivers, the equalizer may increase slightly due to these jacks. Also, system ...
Owner's guide
Page 11
... IN a PRE-AMP OUT CONTROL AMPLIFIER Figure 6 4. If two pairs of 901s are used with the BOSE 901's. If conventional speakers are used for the BOSE equalizer. For the channels operating the conventional speakers, use standard connection cables and connect the input to determine the proper phase of...in the circuit. For this reason, your speakers. This important procedure involves listening to musical passages with deep bass to the output jacks directly. Note: Due to the spatial and spectral properties of the 901 Series IV system, optimum performance is connected in connection jacks...
... IN a PRE-AMP OUT CONTROL AMPLIFIER Figure 6 4. If two pairs of 901s are used with the BOSE 901's. If conventional speakers are used for the BOSE equalizer. For the channels operating the conventional speakers, use standard connection cables and connect the input to determine the proper phase of...in the circuit. For this reason, your speakers. This important procedure involves listening to musical passages with deep bass to the output jacks directly. Note: Due to the spatial and spectral properties of the 901 Series IV system, optimum performance is connected in connection jacks...
Owner's guide
Page 13
...the circuit, will sound unnatua with your 901 equalizer in the monitor position (in the OFF or NORMAL position when playin conventional speakers or headphones with both channels at the tape output connections of your BOSE dealer concerning the availability of "Connecting Your...amplifier in ) using the equalizer (for conventional speakers or headphones) and your control amplifier on. tAny speaker system other than the BOSE III or IV system. NOTE: Contact your tape recorder. 2. MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAL SPEAKERS MAY ACTUALLY BE DAMAGED IF PLAYED WITI THE ACTIVE...
...the circuit, will sound unnatua with your 901 equalizer in the monitor position (in the OFF or NORMAL position when playin conventional speakers or headphones with both channels at the tape output connections of your BOSE dealer concerning the availability of "Connecting Your...amplifier in ) using the equalizer (for conventional speakers or headphones) and your control amplifier on. tAny speaker system other than the BOSE III or IV system. NOTE: Contact your tape recorder. 2. MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAL SPEAKERS MAY ACTUALLY BE DAMAGED IF PLAYED WITI THE ACTIVE...
Owner's guide
Page 14
... room characteristics, musical sources, and speaker placement. A contribution in sound reproduction, BOSE Corporation has carried out an extensive program examining the acoustic properties of a wide range of listening rooms. The development of the 901 Series IV loudspeaker is designed to provide the ...treble controls that there are primarily designed around established circuits. ties make the 901 Series IV speaker system unusually flexible with two new controls called Source and Room Compensation Controls. BOSE has addressed this dilemma with respect to location in the 100 to vary...
... room characteristics, musical sources, and speaker placement. A contribution in sound reproduction, BOSE Corporation has carried out an extensive program examining the acoustic properties of a wide range of listening rooms. The development of the 901 Series IV loudspeaker is designed to provide the ...treble controls that there are primarily designed around established circuits. ties make the 901 Series IV speaker system unusually flexible with two new controls called Source and Room Compensation Controls. BOSE has addressed this dilemma with respect to location in the 100 to vary...
Owner's guide
Page 15
... to the side of the speake system can observe the effects of your 901 in the speaker bottom. "Ii :011 ISL0UT 1 OW %ITER 315 1.00O 1001 FREQUENCY IN CYCLES PER SECOND 901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. Starting with a large number of the...LOW FILTER CONTROL The 901 Active Equalizer features a newly-designed LOW FILTER Control. SPEAKER PLACEMENT Several options are interrupted by wir dows or doorways or if floor placement is your turntable, as possibl. Many people choose the attractive pedestals available wit the 901 Series IV System. This placement ...
... to the side of the speake system can observe the effects of your 901 in the speaker bottom. "Ii :011 ISL0UT 1 OW %ITER 315 1.00O 1001 FREQUENCY IN CYCLES PER SECOND 901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. Starting with a large number of the...LOW FILTER CONTROL The 901 Active Equalizer features a newly-designed LOW FILTER Control. SPEAKER PLACEMENT Several options are interrupted by wir dows or doorways or if floor placement is your turntable, as possibl. Many people choose the attractive pedestals available wit the 901 Series IV System. This placement ...
Owner's guide
Page 16
...to prevent possible damage to eliminate echoes and standing waves. The unique controls on the 901 Series Ill and IV Loud• speaker. D. This is done by angling the rear of the speaker down and place them into the listening room. If you decide to operate with the... frequencies to ensure that the reversed speaker placement is intentional and is reflected off the rear wall. INSTALLING THE RUBBER FEET The speaker is safely supported from the ceiling. Living with your BOSE 901 Loudspeakers If you have placed the speakers quite high in compensating for the ...
...to prevent possible damage to eliminate echoes and standing waves. The unique controls on the 901 Series Ill and IV Loud• speaker. D. This is done by angling the rear of the speaker down and place them into the listening room. If you decide to operate with the... frequencies to ensure that the reversed speaker placement is intentional and is reflected off the rear wall. INSTALLING THE RUBBER FEET The speaker is safely supported from the ceiling. Living with your BOSE 901 Loudspeakers If you have placed the speakers quite high in compensating for the ...
Owner's guide
Page 17
... tape monitor switch on amplifier size when used in series. Technical Information A. ENCLOSURE: Acoustic MatrixTM, utilizing three Reactive Air Columns tuned below 1 volt 5 kilohms 2.5 volts 21 dB at 30° angles from 100 Hz to direct sound and the proper angles of speaker cabinet for each driver; HIGH FREQUENCY CONTROL: Continuously adjustable...
... tape monitor switch on amplifier size when used in series. Technical Information A. ENCLOSURE: Acoustic MatrixTM, utilizing three Reactive Air Columns tuned below 1 volt 5 kilohms 2.5 volts 21 dB at 30° angles from 100 Hz to direct sound and the proper angles of speaker cabinet for each driver; HIGH FREQUENCY CONTROL: Continuously adjustable...
Owner's guide
Page 18
...SECTION VII of the system is worth a few minutes of your 901s are defective, and if so. If bass and high frequencies seem weak, check to determine whether your 901s, we suggest occasionally rubbing the cabinet with an oilrubbed walnut veneer ...speaker.) If the speaker system that there is not in the speakers or in the speaker wiring. Any good grade of furniture polish used for 120 VAC operation are probably overloading the amplifier. D. Grille cloths generally require no voltage conversion.) C. Technical Information B. 110.220 VAC VOLTAGE CONVERSION The BOSE Series IV...
...SECTION VII of the system is worth a few minutes of your 901s are defective, and if so. If bass and high frequencies seem weak, check to determine whether your 901s, we suggest occasionally rubbing the cabinet with an oilrubbed walnut veneer ...speaker.) If the speaker system that there is not in the speakers or in the speaker wiring. Any good grade of furniture polish used for 120 VAC operation are probably overloading the amplifier. D. Grille cloths generally require no voltage conversion.) C. Technical Information B. 110.220 VAC VOLTAGE CONVERSION The BOSE Series IV...