Bose 901 Series II - Manual (Page 4)

The following guidelines should be followed in placing the speakers relative to other surfaces in the room. The
basic idea is to provide space around the speakers to allow sound waves coming from the rear of the speaker to
properly disperse.
1. The speakers should be placed at least 18 inches from the floor.
2. If you are hanging the speakers from the ceiling, they should be positioned no closer than 18 inches from
the celling. DO NOT place your speakers exactly half-way between the floor and the ceiling. (See Fig. 1.)
3. The speakers should be at least 18 inches from the side walls or from openir^gs into adjacent rooms.
4. The speakers should be at least 18 inches from nearby massive objects such as bookcases, cabinets, or other
large pieces of furniture.
5. The separation between the speakers should be between 4 and 15 feet. (Best results will be obtained with a
separation of 6 to 12 feet.)
6. In general, you should use common sense and be sure to select an arrangement which does not appear to
block the radiation and reflection of the sound into the room. The 901s can be placed on pedestals or
tables, on top of cabinets, or on shelves, as tong as the preceding guidelines are followed.
7. If the speakers are in a room with a color television, DO NOT place the speakers closer than 3 feet to the
television. All loudspeakers are equipped with powerful magnets which may disturb the delicate adjust­
ments of your color TV.
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B. CONNECTING THE SPEAKERS
1. SELECTING THE SPEAKER WIRE
If the wire chosen for connecting the speakers to your amplifier has too much resistance, audible colora­
tion of the sound and loss of power can result. The table below summarizes the permissible wire
lengths for 18. 16. and 14 gauge two-conductor copper wire for one or two pairs of BOSE 901 speaker
system(s). Copper zipcord wire is readily available at most electrical and hardware stores. This wire usually
has a ribbed line running along one of the two conductors so that the conductor can be identified at each
end for obtainirtg the proper phasing of your BOSE 901 speakers.
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TABLE 1 - WIRE LENGTHS FOR EACH SPEAKER
Type of Speaker
Hook-up Wire
One Pair
of 901s
Two Pairs
of 901s
18 gauge zipcord
(or two-conductor wire)
33 feet 14 feet
16 gauge two-conducior
wire
54 feet 23 feet
14 gauge two-conductor
wire
86 feet 36 feet
2. PHASING YOUR 901 SPEAKER
It is imporiani that the connections to the speakers and the receiver or amplifier be the same for both
channels so that the two speakers are m phase with each other. The two terminals on the bottom of the 901
are marked ”8 OHMS” and ''COM.'*
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