Bose 901 Series III - Manual (Page 8)

Installafion
B. CONNECTING THE SPEAKERS
1. Wire Selection
If the wire used to connect the speakers to your power am­
plifier has too much resistance, audible coloration of the
sound and loss of power can result, The table below summar­
izes maximum wire lengths for 18*. 16*. and 14-gauge, two-
conductor. stranded copper wire for use with one or two
pairs of BOSE 901 loudspeakers
TABLE 1
RECOMMENDED CONNECTION WIREf
Wire Length
One Pair
of 901s
Wire Length
Two Pairs
of 901s
Type of Speaker
Hook-Up Wire
27 feet 13 feet 18-gauge zipcord
(or two-conductor wire)
42 feet 21 feet 16-gauge two-conductor
wire
67 feet 34 feet 14-gauge two-conductor
wire
In most inslances. copper zip-cord, readily available at most
electrical and hardware stores, can be used for speaker con­
nection. This wire usually lias a ribbed iine(s) along one
side of the insulation so that each wire can be identified for
proper phasing of your speaker system.
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2. Phasing/Wiring
It is important that the amplifier connections for both 901
speaker systems be identical (see Figure 3) so that both
speakers work together (in phase).
a. Start with the speaker marked “Part 1."
b. Place it on the left side of your room facing the speaker
system.
c. Locate the **+" and terminals on the bottom of the
speaker
d. Using the speaker wire (which is marked to distinguish
one conductor from the other), connect the "Part 1"
speaker
terminal marked to the terminal marked
"com." "negative." or "minus" on the left channel ampli­
fier output. (When connecting the 901 Series III loud­
speakers to your amplifier, if there is a choice of impe­
dances on the amplifier output, use the terminal marked
"8" or "8 ohms." If two pairs of 901 Series III loudspeak­
ers are being connected, the terminal marked "4" or "4
ohms" on the receiver or amplifier should be used.)tt
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