Owner's guide
Page 2
...Voltage Conversion C. Covered by oaten: rights .ssued attS pert&ng. Placing the Speakers B. Connecting the Speakers 1. PhasirgINHng 3. Using the Tape Monitor Circuit 2. Headphones and Conventional Speakers V. Specifications B. Warranty 19 r..; '978 DOSE Ccrpo•aticn. Installation 4... 3. Speaker Placement D. Care and Maintenance VII. Unpacking Instructions 3 III. Room Acoustics VI. Connecting the Equalizer 1. Tape Recorders B. Wire Selection 2. Fusing C. Using 1-cur-Chanre IV. Connecting Other Equipment 12 A. Living with your BOSE 901 Speakers 14...
...Voltage Conversion C. Covered by oaten: rights .ssued attS pert&ng. Placing the Speakers B. Connecting the Speakers 1. PhasirgINHng 3. Using the Tape Monitor Circuit 2. Headphones and Conventional Speakers V. Specifications B. Warranty 19 r..; '978 DOSE Ccrpo•aticn. Installation 4... 3. Speaker Placement D. Care and Maintenance VII. Unpacking Instructions 3 III. Room Acoustics VI. Connecting the Equalizer 1. Tape Recorders B. Wire Selection 2. Fusing C. Using 1-cur-Chanre IV. Connecting Other Equipment 12 A. Living with your BOSE 901 Speakers 14...
Owner's guide
Page 3
Save the cartons and packing material for purchasing the BOSE 901 Series IV DirecUReflectinge speaker system. Unpacking Instructions The 901 Series IV speaker system is installed, connected, and operated differently than conventional loudspeakers. I. The detailed installation and placement instructions found... electronic active equalizer, is packed in operation. If either of bringing superb musical reproduction into the home. The BOSE 901 Series IV, with the "Part 1" speaker. The active equalizer is the culmination of many years of research dedicated to the art of the...
Save the cartons and packing material for purchasing the BOSE 901 Series IV DirecUReflectinge speaker system. Unpacking Instructions The 901 Series IV speaker system is installed, connected, and operated differently than conventional loudspeakers. I. The detailed installation and placement instructions found... electronic active equalizer, is packed in operation. If either of bringing superb musical reproduction into the home. The BOSE 901 Series IV, with the "Part 1" speaker. The active equalizer is the culmination of many years of research dedicated to the art of the...
Owner's guide
Page 4
... like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for best sound, 2) connecting the speaker to your listening room, simulating the spatial characteristics of the speaker toward the reflecting wall (the wall behind the speaker). The point of the 901 speaker (see Figure 1). Installation Your 901 Series IV speaker system consists of three steps: 1)placing your amplifying...
... like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for best sound, 2) connecting the speaker to your listening room, simulating the spatial characteristics of the speaker toward the reflecting wall (the wall behind the speaker). The point of the 901 speaker (see Figure 1). Installation Your 901 Series IV speaker system consists of three steps: 1)placing your amplifying...
Owner's guide
Page 6
... as "add-on the left channel output of BOSE 901 loudspeakers. b. Following the guidelines provided, the most recently manufactured receivers or amplifiers will be purchased without the equalizer. Place it on " pairs and can be used . e. If two pairs of 901 Series IV loudspeakers are increased by the speaker wire. itNote: When operating your dealer if...
... as "add-on the left channel output of BOSE 901 loudspeakers. b. Following the guidelines provided, the most recently manufactured receivers or amplifiers will be purchased without the equalizer. Place it on " pairs and can be used . e. If two pairs of 901 Series IV loudspeakers are increased by the speaker wire. itNote: When operating your dealer if...
Owner's guide
Page 7
...location. M'Jfv.: AMPLIFIER OR RECEIVER LEFT RIGHT CHANNEL OUTPUT CHANNEL OUTPUT POS COM POS COM + Figure3 BOSE Corporation recommends use of a fast-acting fuse in series with each speaker will minimize the possibility of the room and repeat the connection procedure for $5.00. A fuse kit ...to damage if the amplifier powering it should be obtained from BOSE Customer Service Department for the right amplifier channel. Place the speaker marked "Part 2" on the right side of serious damage to the speaker connection diagram, the fuseholders should be inserted in the positive wire...
...location. M'Jfv.: AMPLIFIER OR RECEIVER LEFT RIGHT CHANNEL OUTPUT CHANNEL OUTPUT POS COM POS COM + Figure3 BOSE Corporation recommends use of a fast-acting fuse in series with each speaker will minimize the possibility of the room and repeat the connection procedure for $5.00. A fuse kit ...to damage if the amplifier powering it should be obtained from BOSE Customer Service Department for the right amplifier channel. Place the speaker marked "Part 2" on the right side of serious damage to the speaker connection diagram, the fuseholders should be inserted in the positive wire...
Owner's guide
Page 8
... THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. b. Plug the ac power cord of a tape recorder. this is important because conventional speakers and headphones should realize that the 901 equalizer is being connected to the section describing the connection ...power to these various corn ponents as if it from your control amplifier. (Instructions in SECTION IV will automatically be used with the Active Equalizer. (See SECTION IV.) Also, optimum system noise performance is connected just like a tape recorder. e. If the ...
... THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. b. Plug the ac power cord of a tape recorder. this is important because conventional speakers and headphones should realize that the 901 equalizer is being connected to the section describing the connection ...power to these various corn ponents as if it from your control amplifier. (Instructions in SECTION IV will automatically be used with the Active Equalizer. (See SECTION IV.) Also, optimum system noise performance is connected just like a tape recorder. e. If the ...
Owner's guide
Page 9
... sound does not stop . NOTE 2: THE 901 SERIES IV AND III EQUALIZERS ARE NOT COMPATIBLE WITH THE 901 SERIES I TAPE RECORDER CONNECTIONS L A t A L R - h. i. Turn your amplifier or speaker connections carefully.) You have now tested the amplifier, wiring, and speaker systems, but not the equalizer, as you ... or TAPE FUNCTION switch on , then the equalizer is plugged into the system. I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 Place the TAPE MONITOR or TAPE FUNCTION switch of the equalizer in the "out" ...
... sound does not stop . NOTE 2: THE 901 SERIES IV AND III EQUALIZERS ARE NOT COMPATIBLE WITH THE 901 SERIES I TAPE RECORDER CONNECTIONS L A t A L R - h. i. Turn your amplifier or speaker connections carefully.) You have now tested the amplifier, wiring, and speaker systems, but not the equalizer, as you ... or TAPE FUNCTION switch on , then the equalizer is plugged into the system. I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 Place the TAPE MONITOR or TAPE FUNCTION switch of the equalizer in the "out" ...
Owner's guide
Page 10
...immediately before the power amplifier input. Also, system noise may not function if connected to the connection of connecting the BOSE Active Equalizer makes use with one or two tape recorders in the conventional manner. this may prove inconvenient if you do... by many manufacturers on their receivers or integrated amplifiers (see Figure 5). However, this connection method involves using conventional speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of connection permanently connects the equalizer in this manner, it is permanently wired into ...
...immediately before the power amplifier input. Also, system noise may not function if connected to the connection of connecting the BOSE Active Equalizer makes use with one or two tape recorders in the conventional manner. this may prove inconvenient if you do... by many manufacturers on their receivers or integrated amplifiers (see Figure 5). However, this connection method involves using conventional speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of connection permanently connects the equalizer in this manner, it is permanently wired into ...
Owner's guide
Page 11
...BOSE 901's. For the channels operating the conventional speakers, use the tape recorder connection jacks on the equalizer and leave the TAPE switch (on the equalizer) in the circuit. For separate components, connect the equalizer after the output of the 901 Series IV... system, optimum performance is connected in the NORMAL position. Note: Due to recheck your control amplifier's speaker phasing procedure should be certain to the spatial and spectral properties of the decoder. ...
...BOSE 901's. For the channels operating the conventional speakers, use the tape recorder connection jacks on the equalizer and leave the TAPE switch (on the equalizer) in the circuit. For separate components, connect the equalizer after the output of the 901 Series IV... system, optimum performance is connected in the NORMAL position. Note: Due to recheck your control amplifier's speaker phasing procedure should be certain to the spatial and spectral properties of the decoder. ...
Owner's guide
Page 13
... monitor input connections of "Connecting Your Tape Recorder." 3. Connect one side of the 90 speakers. tAny speaker system other than the BOSE III or IV system. CONNECTING HEADPHONES AND CONVENTIONAL SPEAKERS It is important to switch the Active Equalize out of the circuit by placing the tape... recorder without the equalizer. NOTE: Contact your tape recorder. 2. Consequently, conventional speakers or headphone: if played with the equalizer in the circuit, will play your tape recorder with your 901s, place the tape monitor of your control amplifier has two tape monitor circuits, an...
... monitor input connections of "Connecting Your Tape Recorder." 3. Connect one side of the 90 speakers. tAny speaker system other than the BOSE III or IV system. CONNECTING HEADPHONES AND CONVENTIONAL SPEAKERS It is important to switch the Active Equalize out of the circuit by placing the tape... recorder without the equalizer. NOTE: Contact your tape recorder. 2. Consequently, conventional speakers or headphone: if played with the equalizer in the circuit, will play your tape recorder with your 901s, place the tape monitor of your control amplifier has two tape monitor circuits, an...
Owner's guide
Page 14
... new performance is the new I driver used with your BOSE 901 Loudspeakers The effect of its ongoing research in non-commercial ap- The new 901 Series IV equalizer addresses this control allows the speaker system to radically modify the tonal balance of any specific ... the 100 to match the acoustics of room characteristics, musical sources, and speaker placement. ties make the 901 Series IV speaker system unusually flexible with the LOW FREQUENCY CONTROL that are followed. BOSE has addressed this owner's manual are primarily designed around established circuits. SOURCE...
... new performance is the new I driver used with your BOSE 901 Loudspeakers The effect of its ongoing research in non-commercial ap- The new 901 Series IV equalizer addresses this control allows the speaker system to radically modify the tonal balance of any specific ... the 100 to match the acoustics of room characteristics, musical sources, and speaker placement. ties make the 901 Series IV speaker system unusually flexible with the LOW FREQUENCY CONTROL that are followed. BOSE has addressed this owner's manual are primarily designed around established circuits. SOURCE...
Owner's guide
Page 15
... OW %ITER 315 1.00O 1001 FREQUENCY IN CYCLES PER SECOND 901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. Make certain the shelving is to hold your adjustment of the speake system can be used to suspend the speaker syster from the ceiling (see Figure 1). This placement method ... speakers optimum performance. Note that will be used . Accordingly, it is deep enough to its effect. Shelving that is important to the side of these controls that since no room is typical, it is used . Many people choose the attractive pedestals available wit the 901 Series IV System...
... OW %ITER 315 1.00O 1001 FREQUENCY IN CYCLES PER SECOND 901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. Make certain the shelving is to hold your adjustment of the speake system can be used to suspend the speaker syster from the ceiling (see Figure 1). This placement method ... speakers optimum performance. Note that will be used . Accordingly, it is deep enough to its effect. Shelving that is important to the side of these controls that since no room is typical, it is used . Many people choose the attractive pedestals available wit the 901 Series IV System...
Owner's guide
Page 16
Living with your BOSE 901 Loudspeakers If you have placed the speakers quite high in the four holes (C) located near the corners of different rooms. SNA lai ti -11.4 THREE-CHAIN OR FOUR-CHAIN MOUNTING Three-chain ... frequently may be introduced by increasing the length of the rear chain(s) holding the speaker system in place. The unique controls on the 901 Series Ill and IV Loud• speaker. When suspending the speaker with wall-to ensure that the reversed speaker placement is intentional and is safely supported from the ceiling. ROOM ACOUSTICS The acoustical...
Living with your BOSE 901 Loudspeakers If you have placed the speakers quite high in the four holes (C) located near the corners of different rooms. SNA lai ti -11.4 THREE-CHAIN OR FOUR-CHAIN MOUNTING Three-chain ... frequently may be introduced by increasing the length of the rear chain(s) holding the speaker system in place. The unique controls on the 901 Series Ill and IV Loud• speaker. When suspending the speaker with wall-to ensure that the reversed speaker placement is intentional and is safely supported from the ceiling. ROOM ACOUSTICS The acoustical...
Owner's guide
Page 17
...x 11%" Wide 80 kilohms < 0.1% (1.0-volt output) 90 dB below system resonance and partially isolated individual cells for maximum efficiency. 6. VI. Speaker Configuration SPATIAL CHARACTERISTICS: Eight speakers reflecting sound at 8 ohms. Maximum Recommended Power: No power restrictions on receiver or amplifier when equalizer is connected in non-commercial applications, providing...176;/o 4. linear, high-excursion suspension; LOW FILTER CONTROL: Two-position, 5 dB decrease at 10 kHz. SPECIFICATIONS 1. The system Is packed in series. Part 2, 43.5 lbs. Impedance: 8 ohms 3.
...x 11%" Wide 80 kilohms < 0.1% (1.0-volt output) 90 dB below system resonance and partially isolated individual cells for maximum efficiency. 6. VI. Speaker Configuration SPATIAL CHARACTERISTICS: Eight speakers reflecting sound at 8 ohms. Maximum Recommended Power: No power restrictions on receiver or amplifier when equalizer is connected in non-commercial applications, providing...176;/o 4. linear, high-excursion suspension; LOW FILTER CONTROL: Two-position, 5 dB decrease at 10 kHz. SPECIFICATIONS 1. The system Is packed in series. Part 2, 43.5 lbs. Impedance: 8 ohms 3.
Owner's guide
Page 18
...of being defective at high sound levels that there is a problem with linseed oil. If the trouble still persists, contact your 901s are not convertable to 240 volt operation except by disconnecting the equalizer from the circuit. If the trouble seems to be in ...is not in the speakers or in SECTION VII of the system is defective. The complete procedure for proper operation. Grille cloths generally require no voltage conversion.) C. Technical Information B. 110.220 VAC VOLTAGE CONVERSION The BOSE Series IV Equalizer is designed to operate on one speaker sounds defective, DO ...
...of being defective at high sound levels that there is a problem with linseed oil. If the trouble still persists, contact your 901s are not convertable to 240 volt operation except by disconnecting the equalizer from the circuit. If the trouble seems to be in ...is not in the speakers or in SECTION VII of the system is defective. The complete procedure for proper operation. Grille cloths generally require no voltage conversion.) C. Technical Information B. 110.220 VAC VOLTAGE CONVERSION The BOSE Series IV Equalizer is designed to operate on one speaker sounds defective, DO ...
