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Most Recent Bose 901 Series IV Questions
Loose Terminal
how do i open the speaker to tighten a terminal post that has come loose?
how do i open the speaker to tighten a terminal post that has come loose?
(Posted by alanlynn 2 years ago)
I Want S Service Manual For 901 Iv Ver 1
I need to find the cause of a distorted sound in my left channel of my 901 series IV version 1 activ...
I need to find the cause of a distorted sound in my left channel of my 901 series IV version 1 activ...
(Posted by octoman13 2 years ago)
Bose 901 Series Iv Equalizer
having a hard time setting up equalizer with low and high frequency. Can you help
having a hard time setting up equalizer with low and high frequency. Can you help
(Posted by Chrisdenosta794 7 years ago)
Can You Fix Bose 901 Series Iv Equalizer
(Posted by DYOUNskyl 9 years ago)
How Do You Hook Up 901 Bose Speakers And Equalizer To Amplifier With Diagram
(Posted by BabylMbona 10 years ago)
Bose 901 Series IV Videos
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Popular Bose 901 Series IV Manual Pages
Owner's guide - Page 2
...ng. Table of Difficulty D. Living with your BOSE 901 Speakers
14
A. Source and Room Compensation Controls B. Room Acoustics
VI. Specifications
B. Care and Maintenance
VII. Warranty
19
r..; '978 DOSE Ccrpo•aticn. Connecting the Equalizer
1. Using the Prea.rnp-OutiMain-Ir Czrou]l 4. Unpacking Instructions
3
III. PhasirgINHng
3. Tape Recorders B. Using...
Owner's guide - Page 3
... material along with its high proportion of reflected sound, nine full-range drivers, and a newly-designed electronic active equalizer, is found in operation. PLEASE TAKE THE TIME TO READ THESE INSTRUCTIONS CAREFULLY. Unpacking Instructions
The 901 Series IV speaker system is the culmination of many years of research dedicated to the art of the speakers has visible damage when unpacked, do...
Owner's guide - Page 4
... IV speaker system consists of the speaker toward the reflecting wall (the wall behind the speaker). PLACING THE SPEAKERS
Unlike conventional speakers, the 901 Series IV functions with a live
performance.
Distances closer to develop around the speaker system.
1.
Point this portion of three parts: two speakers (marked "Part 1" and "Part 2") and an electronic Active Equalizer...
Owner's guide - Page 6
... equalizer. The table below summarizes maximum wire lengths for future electronic Flevelopments and should be identical (see Figure 3) so that each wire can be unable to your amplifier, if there is not capable of 4-ohm Operation with the speaker marked "Part 1." b.
If two pairs of 901 Series IV loudspeakers are used to connect the speakers to your equipment. Installation...
Owner's guide - Page 7
... series with a fast-blow, 3-amp fuse. M'Jfv.:
AMPLIFIER OR RECEIVER
LEFT
RIGHT
CHANNEL OUTPUT CHANNEL OUTPUT
POS COM
POS
COM
+
Figure3
Fusing Any loudspeaker is required. The use of serious damage to damage if the amplifier powering it should be
obtained from BOSE Customer Service Department for the right amplifier channel. Ask for part...
Owner's guide - Page 8
... may also be due to the following instructions:
a. Remember, the equalizer is obtained when connecting the equalizer in this procedure, you how to determine if your control amplifier. g. 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.
Using one of the cables...
Owner's guide - Page 9
... THE FOLLOWING STEPS ARE PROVIDED TO ENSURE
THAT THE EQUALIZER IS PROPERLY CONNECTED TO YOUR HIGH-FIDELITY SYSTEM. h. Set the LOW FILTER control in the middle of your ...II SPEAKER SYSTEMS. HOWEVER, THE 901 SERIES IV EQUALIZER IS COMPATIBLE WITH THE 901 SERIES III SPEAKER SYSTEM.
9 Place the TAPE switch of the equalizer in connection of the test.)
I ." plifier and observe that the equalizer ...
Owner's guide - Page 10
...speakers or headphones. (See SECTION IV.) Due to the circuitry characteristics of some receivers, the equalizer may increase slightly due to these jacks. Using the Preamp•Out/Main-ln Circuit
An alternate method of connection permanently connects the equalizer.... (See SECTION IV.) If you do connect the equalizer in this method of connecting the BOSE Active Equalizer makes use with ...
Owner's guide - Page 11
... involves listening to the output jacks directly. In most cases, this method of speaker connections. NUT
R
L
MAIN-AMP IN
a
PRE-AMP OUT
CONTROL AMPLIFIER Figure 6
4. Connect one equalizer for the rear channels. These connection jacks can be used , two active equalizers are not used, we suggest using conventional speakers with the BOSE 901's.
For the channels operating the...
Owner's guide - Page 12
..., simply place the TAPE switch on the equalizer for the connection of the tape recorder is normally connected, extra jacks are provided on the 901 Active Equalizer in the MONITOR position (in). R
L...RECORDER TO THE BOSE ACTIVE EQUALIZER, NOT TO THE UNUSED TAPE MONITOR ON YOUR RECEIVER. Connecting Other Equipment
A. Connect the RIGHT channel TAPE IN jack on the equalizer to the LEFT ...
Owner's guide - Page 13
B. MORE IMPORTANTLY, HEADPHONES AND CONVENTIONAL SPEAKERS MAY ACTUALLY BE DAMAGED IF PLAYED WITI THE ACTIVE EQUALIZER IN THE CIRCUIT. control amplifier in the OFF or NORMAL position when playin conventional speakers or headphones with your control amplifier.
4. tAny speaker system other than the BOSE III or IV system. Connect "Y" connectors to both treble and bass being emphasized. With...
Owner's guide - Page 14
... improved to achieve the correct spectral balance.
A.
The new 901 Series IV equalizer addresses this control allows the speaker system to the point that there are no restrictions on the size of room characteristics, musical sources, and speaker placement. Certain portions of the midbass of any specific compensation requirement and therefore cannot compensate for the effects of...
Owner's guide - Page 15
...FILTER CONTROL
The 901 Active Equalizer features a newly-designed LOW FILTER Control. Many people choose the attractive pedestals available wit the 901 Series IV System. Preset the HIGH FREQUENCY Control 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. SPEAKER PLACEMENT
Several options...
Owner's guide - Page 16
... improved by your 901 IV Equalizer are especially helpful in compensating for the characteristics of rugs and heavy drapery, which allow low frequencies to pass through rather than reflecting them on the 901 Series Ill and IV Loud• speaker.
D. those with uncovered floors or scatter rugs, small amounts of furniture, hard walls) can be directed downward by increasing...
Owner's guide - Page 17
....
6. The system Is packed in series. The Speaker
Dimensions: 21" Wide x 12%" High x 13" Deep
Weight: 35 lbs. Impedance: 8 ohms
3. one speaker directed into the listening area to provide the optimum ratio of reflected to 400 Hz. low impedance (0.9 ohms) voice coils connected in two cartons marked "Part 1" and "Part 2." The Active Equalizer
TAPE MONITOR SWITCH: Replaces tape monitor switch on...
Bose 901 Series IV Reviews
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