Owner's guide
Page 3
.... Save the cartons and packing material for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. Repack the speaker(s) in the original carton with the "Part 1" speaker. • I. nine full-range drivers, and electronic active equalization, is packed in this manual are important. UnpackingInstructions The 901 Series III speaker system is installed, connected, and operated differently than...
.... Save the cartons and packing material for purchasing the BOSE 901 Series III Direct/Reflecting• speaker system. Repack the speaker(s) in the original carton with the "Part 1" speaker. • I. nine full-range drivers, and electronic active equalization, is packed in this manual are important. UnpackingInstructions The 901 Series III speaker system is installed, connected, and operated differently than...
Owner's guide
Page 4
Active Equalization The active equalizer electronically corrects for smoother, more controlled frequency response and lower distortion. • An injection molded frame, eliminating distortion of a live performance. 2. B. TECHNOLOGICAL INNOVATIONS...magnetic field (caused by steel frames) and improving precision in certain portions of total acoustic power at every frequency. 3. III. Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is accomplished by the mechanical design constraints of the helical voice coil and precision assembly means that a 15 watt amplifier...
Active Equalization The active equalizer electronically corrects for smoother, more controlled frequency response and lower distortion. • An injection molded frame, eliminating distortion of a live performance. 2. B. TECHNOLOGICAL INNOVATIONS...magnetic field (caused by steel frames) and improving precision in certain portions of total acoustic power at every frequency. 3. III. Correct Balance of Reflected and Direct Sound The BOSE 901 Series III is accomplished by the mechanical design constraints of the helical voice coil and precision assembly means that a 15 watt amplifier...
Owner's guide
Page 5
... specifically to work with nine full-range matched drivers in a wide range of room positions (see SECTION VI). • Control of response of active equalization with the active equalizer. The 901 Series III realizes additional advantages of the speaker beyond the audible range. Additionally, the enclosure partially isolates the acoustic pressure at each group of the loudspeaker...
... specifically to work with nine full-range matched drivers in a wide range of room positions (see SECTION VI). • Control of response of active equalization with the active equalizer. The 901 Series III realizes additional advantages of the speaker beyond the audible range. Additionally, the enclosure partially isolates the acoustic pressure at each group of the loudspeaker...
Owner's guide
Page 6
...electronic Active Equalizer packed in most rooms. If you obtain the best performance. however, separation as small as 3' or as great as furniture) should be obtained with live performances. REFLECTING WALL tr-15' 16'-341" Figuru 1 Installation Your 901 Series III speaker system consists of the 901 ... Large objects (such as 15' will help you have not decided where to 10'; SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for speaker placement. Installation consists of your amplifying equipment. simulating the spatial characteristics of the...
...electronic Active Equalizer packed in most rooms. If you obtain the best performance. however, separation as small as 3' or as great as furniture) should be obtained with live performances. REFLECTING WALL tr-15' 16'-341" Figuru 1 Installation Your 901 Series III speaker system consists of the 901 ... Large objects (such as 15' will help you have not decided where to 10'; SECTION VI (LIVING WITH YOUR BOSE 901 SPEAKERS) provides several additional suggestions for speaker placement. Installation consists of your amplifying equipment. simulating the spatial characteristics of the...
Owner's guide
Page 10
... allintegratedamplifiers,preamplifiers.and receivers.tUsingthe tapemonitorcircuit hastwoadvantages: When using conventional loudspeakers or headphones, the tapemonitorcircuit allowsdisconnectionof the Active Equalizer by various manufacturers of your control amplifier. (This terminal may be used by turning off all IA ...determine if your unit has any additional switching flexibility. b. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. Turn off the tape monitor switch on your control...
... allintegratedamplifiers,preamplifiers.and receivers.tUsingthe tapemonitorcircuit hastwoadvantages: When using conventional loudspeakers or headphones, the tapemonitorcircuit allowsdisconnectionof the Active Equalizer by various manufacturers of your control amplifier. (This terminal may be used by turning off all IA ...determine if your unit has any additional switching flexibility. b. CONNECTING THE EQUALIZER IT IS MOST IMPORTANT THAT YOU FOLLOW THESE INSTRUCTIONS FOR OPTIMUM PERFORMANCE OF YOUR 901 SERIES III SPEAKER SYSTEM. 1. Turn off the tape monitor switch on your control...
Owner's guide
Page 11
... light is not functioning at this portion of your system is on the front panel). NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE 901 SERIES I TAPE CONTROL AMPLIFIER Figure 4 k. Set the "BELOW 40" control in the MONITOR Position. i. MON AEC R L /I AND II SPEAKER SYSTEMS. ... NOTE 1: THE TAPE MONITOR OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. Place the TREBLE and MIDBASS controls at this...
... light is not functioning at this portion of your system is on the front panel). NOTE 2: THE 901 SERIES III EQUALIZER IS NOT COMPATIBLE WITH THE 901 SERIES I TAPE CONTROL AMPLIFIER Figure 4 k. Set the "BELOW 40" control in the MONITOR Position. i. MON AEC R L /I AND II SPEAKER SYSTEMS. ... NOTE 1: THE TAPE MONITOR OF YOUR CONTROL AMPLIFIER MUST BE LEFT "ON" FOR THE ACTIVE EQUALIZER TO BE IN THE CIRCUIT. • THE FOLLOWING STEPS ARE PROVIDED TO ENSURE THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. Place the TREBLE and MIDBASS controls at this...
Owner's guide
Page 12
... recommendations). 3. The disadvantage of this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of the equalizer immediately before the power amplifier input. this manner, it is permanently wired into the circuit. (See SECTION V.) If you are using conventional loudspeakers...method provides complete flexibility of the tape monitor circuitry. 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 conventional manner.
... recommendations). 3. The disadvantage of this connection method involves using conventional speakers or headphones. (See SECTION V.) Due to the circuitry characteristics of the equalizer immediately before the power amplifier input. this manner, it is permanently wired into the circuit. (See SECTION V.) If you are using conventional loudspeakers...method provides complete flexibility of the tape monitor circuitry. 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 conventional manner.
Owner's guide
Page 13
... the MAIN-IN terminals of the 901 Series III system, optimum performance is connected in the NORMAL position. Tape recorders are required. For separate components, connect the equalizer after the output of 901s are used for the front channels and one pair of your speaker phasing. Also, be used , two active equalizers are now connected to recheck...
... the MAIN-IN terminals of the 901 Series III system, optimum performance is connected in the NORMAL position. Tape recorders are required. For separate components, connect the equalizer after the output of 901s are used for the front channels and one pair of your speaker phasing. Also, be used , two active equalizers are now connected to recheck...
Owner's guide
Page 14
... jack on the 901 Active Equalizer in the MONITOR position (in). Similarly, connect the LEFT channel TAPE OUT jack on the equalizer to your integrated amplifier. NOTE: IF YOUR CONTROL AMPLIFIER HAS TWO TAPE MONITOR CIRCUITS, BE CERTAIN TO CONNECT YOUR TAPE RECORDER TO THE BOSE ACTIVE EQUALIZER, NOT TO THE... UNUSED TAPE MONITOR ON YOUR RECEIVER. Connect the RIGHT channel TAPE IN jack on the equalizer to FIGURE 7 and follow the next five steps carefully. 1. Refer to the ...
... jack on the 901 Active Equalizer in the MONITOR position (in). Similarly, connect the LEFT channel TAPE OUT jack on the equalizer to your integrated amplifier. NOTE: IF YOUR CONTROL AMPLIFIER HAS TWO TAPE MONITOR CIRCUITS, BE CERTAIN TO CONNECT YOUR TAPE RECORDER TO THE BOSE ACTIVE EQUALIZER, NOT TO THE... UNUSED TAPE MONITOR ON YOUR RECEIVER. Connect the RIGHT channel TAPE IN jack on the equalizer to FIGURE 7 and follow the next five steps carefully. 1. Refer to the ...
Owner's guide
Page 15
Connect "le" connectors to match the power response of the 901 speakers. CONNECTINGHEADPHONES ANDCONVENTIONAL SPEAKERS It is important to realize that the BOSE Active Equalizer introduces substantial boost in the range below 100 Hz and above 4.000 Hz to both treble and bass being emphasized. MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAO ...
Connect "le" connectors to match the power response of the 901 speakers. CONNECTINGHEADPHONES ANDCONVENTIONAL SPEAKERS It is important to realize that the BOSE Active Equalizer introduces substantial boost in the range below 100 Hz and above 4.000 Hz to both treble and bass being emphasized. MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAO ...
Owner's guide
Page 16
... rooms. However, you may require a higher setting of the speaker system. BELOW 40 CONTROL. The perform- The BOSE 901 Series III Active Equalizer addresses this problem with your listening room acoustics. Similarly, placing the speakers further away from 4.000 Hz to reduce ...Living with a unique new control called the "Mid-bass Frequency Contour" control. ADJUSTING YOUR EQUALIZER CONTROLS The 901 Series III equalizer has been completely redesigned with your BOSE 901Speakers A. The "Treble Frequency Contour" control is affected by the speaker's placement. This ...
... rooms. However, you may require a higher setting of the speaker system. BELOW 40 CONTROL. The perform- The BOSE 901 Series III Active Equalizer addresses this problem with your listening room acoustics. Similarly, placing the speakers further away from 4.000 Hz to reduce ...Living with a unique new control called the "Mid-bass Frequency Contour" control. ADJUSTING YOUR EQUALIZER CONTROLS The 901 Series III equalizer has been completely redesigned with your BOSE 901Speakers A. The "Treble Frequency Contour" control is affected by the speaker's placement. This ...
Owner's guide
Page 18
The system is connected in series. Carton Dimensions: 25%" x 16" x I .0-volt output) Noise ("A" weighted): 85 dB below ... rms per channel at 30° angles from 80 Hz to 70 watt range, with center detent; The Active Equalizer BELOW 40 CONTOUR CONTROL: Two-position, eight-dB decrease at 8 ohms. Using high quality equipment, the quality... rms per channel at 40 Hz. TAPE MONITOR SWITCH: Replaces tape monitor switch on receiver or amplifier when equalizer is packed in most listening rooms) should provide more than adequate volume levels. ENCLOSURE: Acoustic Matrix'", utilizing...
The system is connected in series. Carton Dimensions: 25%" x 16" x I .0-volt output) Noise ("A" weighted): 85 dB below ... rms per channel at 30° angles from 80 Hz to 70 watt range, with center detent; The Active Equalizer BELOW 40 CONTOUR CONTROL: Two-position, eight-dB decrease at 8 ohms. Using high quality equipment, the quality... rms per channel at 40 Hz. TAPE MONITOR SWITCH: Replaces tape monitor switch on receiver or amplifier when equalizer is packed in most listening rooms) should provide more than adequate volume levels. ENCLOSURE: Acoustic Matrix'", utilizing...