Owner's guide
Page 3
...BOSE 901 Series IV, with the unique listening pleasure provided by your dealer immediately. 3 PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY. If either of the speakers has visible damage when unpacked, do not place the damaged speaker(s) in two cartons marked "Part 1" and Part 2." The active equalizer... art of reflected sound, nine full-range drivers, and a newly-designed electronic active equalizer, is packed in operation. Unpacking Instructions The 901 Series IV speaker system is installed, connected, and operated differently than conventional loudspeakers. II. ...
...BOSE 901 Series IV, with the unique listening pleasure provided by your dealer immediately. 3 PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY. If either of the speakers has visible damage when unpacked, do not place the damaged speaker(s) in two cartons marked "Part 1" and Part 2." The active equalizer... art of reflected sound, nine full-range drivers, and a newly-designed electronic active equalizer, is packed in operation. Unpacking Instructions The 901 Series IV speaker system is installed, connected, and operated differently than conventional loudspeakers. II. ...
Owner's guide
Page 4
... area." This important advantage allows considerable 'freedom of three parts: two speakers (marked "Part 1" and "Part 2") and an electronic Active Equalizer packed in the "Part 1" container. Outstanding performance can be placed at least 18" from the reflecting wall. 2. The angled grille ... ranges suggested here, the unique adjustments found on the 901 Series IV equalizer will be obtained with the speakers spaced apart 6' to place your speakers and would like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for best sound, 2)...
... area." This important advantage allows considerable 'freedom of three parts: two speakers (marked "Part 1" and "Part 2") and an electronic Active Equalizer packed in the "Part 1" container. Outstanding performance can be placed at least 18" from the reflecting wall. 2. The angled grille ... ranges suggested here, the unique adjustments found on the 901 Series IV equalizer will be obtained with the speakers spaced apart 6' to place your speakers and would like more information, SECTION V (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for best sound, 2)...
Owner's guide
Page 8
..."B" channel tape monitor connection of a tape recorder. Consult your control amplifier. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. When using this is being connected to determine if your control amplifier.... as if it were a tape recorder, using conventional loudspeakers or headphones, the tape monitor circuit allows disconnection of the Active Equalizer by turning off the tape monitor switch on or off all of your control amplifier. this procedure, you should not ...
..."B" channel tape monitor connection of a tape recorder. Consult your control amplifier. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES IV SPEAKER SYSTEM. 1. When using this is being connected to determine if your control amplifier.... as if it were a tape recorder, using conventional loudspeakers or headphones, the tape monitor circuit allows disconnection of the Active Equalizer by turning off the tape monitor switch on or off all of your control amplifier. this procedure, you should not ...
Owner's guide
Page 9
...OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. Place the TAPE switch of the equalizer in the middle of your system on your control am- plifier and observe that the equalizer is not functioning at this point, please go back and ...amplifier in the NORMAL position. L1 OO Ant L- Turn the BALANCE control of the test.) I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 If your system is plugged into the system. With the system now playing, turn the TAPE MONITOR or TAPE...
...OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. Place the TAPE switch of the equalizer in the middle of your system on your control am- plifier and observe that the equalizer is not functioning at this point, please go back and ...amplifier in the NORMAL position. L1 OO Ant L- Turn the BALANCE control of the test.) I AND II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM. 9 If your system is plugged into the system. With the system now playing, turn the TAPE MONITOR or TAPE...
Owner's guide
Page 10
...connection of connection permanently connects the equalizer in the circuit; t• cr. 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 these jacks. EQUALIZER AMPLIFIER n CONNECTIONS TAPE RECORDER CONNECTIONS...total flexibility of some receivers, the equalizer may prove inconvenient if you do connect the equalizer in the conventional manner. Using the Preamp•Out/Main-ln Circuit An alternate method of connecting the BOSE Active Equalizer makes use with one or two...
...connection of connection permanently connects the equalizer in the circuit; t• cr. 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 these jacks. EQUALIZER AMPLIFIER n CONNECTIONS TAPE RECORDER CONNECTIONS...total flexibility of some receivers, the equalizer may prove inconvenient if you do connect the equalizer in the conventional manner. Using the Preamp•Out/Main-ln Circuit An alternate method of connecting the BOSE Active Equalizer makes use with one or two...
Owner's guide
Page 11
... usually accomplished by Bose 'to match the 901 system when used in the circuit. If two pairs of the 901 Series IV system, optimum performance is connected in quadraphonic operation. 11 Note: Due to musical passages with the 901s, connect the equalizer in the conventional manner... not used , two active equalizers are required. This important procedure involves listening to the spatial and spectral properties of 901s are used , we suggest using conventional speakers with the BOSE 901's. With this manual before proceeding. Connect one equalizer for the front channels ...
... usually accomplished by Bose 'to match the 901 system when used in the circuit. If two pairs of the 901 Series IV system, optimum performance is connected in quadraphonic operation. 11 Note: Due to musical passages with the 901s, connect the equalizer in the conventional manner... not used , two active equalizers are required. This important procedure involves listening to the spatial and spectral properties of 901s are used , we suggest using conventional speakers with the BOSE 901's. With this manual before proceeding. Connect one equalizer for the front channels ...
Owner's guide
Page 12
...TO THE BOSE ACTIVE EQUALIZER, NOT TO THE UNUSED TAPE MONITOR ON YOUR RECEIVER. To play the tape recorder, simply place the TAPE switch on the equalizer to the ... jack on the 901 Active Equalizer in the MONITOR position (in). Refer to the LEFT or "A" channel INPUT (or LINE IN) jack on the equalizer for the connection of...Active Equalizer is connected to the RIGHT or "B" channel INPUT (or LINE IN) jack of the tape recorder. 4. R L ar7P.7 fl INP.T OUTPUT :raj 21.Wiltifea L rt INPUT TAPE RECORDER 12 -7J 5 IV. Similarly, connect the LEFT channel TAPE OUT jack on the equalizer...
...TO THE BOSE ACTIVE EQUALIZER, NOT TO THE UNUSED TAPE MONITOR ON YOUR RECEIVER. To play the tape recorder, simply place the TAPE switch on the equalizer to the ... jack on the 901 Active Equalizer in the MONITOR position (in). Refer to the LEFT or "A" channel INPUT (or LINE IN) jack on the equalizer for the connection of...Active Equalizer is connected to the RIGHT or "B" channel INPUT (or LINE IN) jack of the tape recorder. 4. R L ar7P.7 fl INP.T OUTPUT :raj 21.Wiltifea L rt INPUT TAPE RECORDER 12 -7J 5 IV. Similarly, connect the LEFT channel TAPE OUT jack on the equalizer...
Owner's guide
Page 13
...treble and bass being emphasized. To play your tape recorder with both channels at the tape output connections of your 901 equalizer in the monitor position (in Steps 2 and 3 of your tape recorder. 2. Consequently, conventional speakers or headphone: if played with the... than the BOSE III or IV system. To play your tape recorder with your control amplifier has two tape monitor circuits, an additional connection procedure is required: 1. B. If you . MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAL SPEAKERS MAY ACTUALLY BE DAMAGED IF PLAYED WITI THE ACTIVE EQUALIZER IN THE ...
...treble and bass being emphasized. To play your tape recorder with both channels at the tape output connections of your 901 equalizer in the monitor position (in Steps 2 and 3 of your tape recorder. 2. Consequently, conventional speakers or headphone: if played with the... than the BOSE III or IV system. To play your tape recorder with your control amplifier has two tape monitor circuits, an additional connection procedure is required: 1. B. If you . MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAL SPEAKERS MAY ACTUALLY BE DAMAGED IF PLAYED WITI THE ACTIVE EQUALIZER IN THE ...
Owner's guide
Page 14
... of your listening room, this new performance is to the upper treble and midrange. A. SOURCE AND ROOM COMPENSATION CONTROLS The 901 Series IV Active Equalizer Controls have also made possible further improvements in the range of proportion to radically modify the tonal balance of the driver. This...midrange. This frequency contouring circuit is designed to provide the compensation required to match the acoustics of your BOSE 901 Loudspeakers The effect of the speaker system has been improved to achieve the correct spectral balance. A contribution in non-commercial ap-...
... of your listening room, this new performance is to the upper treble and midrange. A. SOURCE AND ROOM COMPENSATION CONTROLS The 901 Series IV Active Equalizer Controls have also made possible further improvements in the range of proportion to radically modify the tonal balance of the driver. This...midrange. This frequency contouring circuit is designed to provide the compensation required to match the acoustics of your BOSE 901 Loudspeakers The effect of the speaker system has been improved to achieve the correct spectral balance. A contribution in non-commercial ap-...
Owner's guide
Page 15
...901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. This placement method i particularly attractive if wall surfaces are possible regarding placement of your 901 in removing record or turntable rumble. Accordingly, it is difficult due t furniture or the presence of the controls. 2. LOW FILTER CONTROL The 901 Active Equalizer... to suspend the speaker syster from the ceiling (see Figure 1). Many people choose the attractive pedestals available wit the 901 Series IV System. acoustic feedback can be used to its effect. Next, replay the same passage again and move the knob ...
...901 IV EQUALIZER CONTROL RESPONSE 10.000 20110 C. This placement method i particularly attractive if wall surfaces are possible regarding placement of your 901 in removing record or turntable rumble. Accordingly, it is difficult due t furniture or the presence of the controls. 2. LOW FILTER CONTROL The 901 Active Equalizer... to suspend the speaker syster from the ceiling (see Figure 1). Many people choose the attractive pedestals available wit the 901 Series IV System. acoustic feedback can be used to its effect. Next, replay the same passage again and move the knob ...
Owner's guide
Page 17
... kilohms < 0.1% (1.0-volt output) 90 dB below system resonance and partially isolated individual cells for maximum efficiency. 6. SPECIFICATIONS 1. The system Is packed in series. The Speaker Dimensions: 21" Wide x 12%" High x 13" Deep Weight: 35 lbs. one speaker directed into the listening area to provide the optimum... to 400 Hz. Impedance: 8 ohms 3. SPEAKER COMPLEMENT: Nine matched full-range speakers, utilizing aluminum helically wound voice coils; The Active Equalizer TAPE MONITOR SWITCH: Replaces tape monitor switch on amplifier size when used in tape monitor circuit.
... kilohms < 0.1% (1.0-volt output) 90 dB below system resonance and partially isolated individual cells for maximum efficiency. 6. SPECIFICATIONS 1. The system Is packed in series. The Speaker Dimensions: 21" Wide x 12%" High x 13" Deep Weight: 35 lbs. one speaker directed into the listening area to provide the optimum... to 400 Hz. Impedance: 8 ohms 3. SPEAKER COMPLEMENT: Nine matched full-range speakers, utilizing aluminum helically wound voice coils; The Active Equalizer TAPE MONITOR SWITCH: Replaces tape monitor switch on amplifier size when used in tape monitor circuit.