Bose 901 Series II - Manual (Page 5)

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Start with the Part 1 portion of your 901 system. Place it on the left side of your room. Connect
this left speaker to the left channel speaker output terminals of your amplifier or receiver. (If there is a
choice of impedances on the amplifier output, use the terminal marked "8^2" or "8 OHMS''.) *
Connect the "COM" terminal on the left speaker to the "COM" terminal on the left channel output of your
receiver or amplifier output. Connect the "8 OHMS" terminal on the left speaker to the "8 OHMS” ter­
minal on the left channel amplifier output. Connect the right speaker (Part 2) in the same manner to the
right channel amplifier outputs {See Fig. 2).
Because of the differing terminology which various manufacturers use on their receivers and amplifiers, we
have provided the chart below to assist you in identifyirtg the proper connection points.
STANDARD RECEIVER/AMPLIFIER TERMINAL MARKINGS
"COMMON" Terminal "COM" "8 OHMS" Terminal "8^"
also known as "0" also known as "Hot" or
"Ground" or
"Positive" (*)
"Negative" (-1
If stranded wire is used, be sure that the loose strands do not touch or short-out the speaker or amplifier
terminals. Also make certain that all amplifier and speaker terminals are tightened securely.
* If two pairs of 901s are being connected in parallel, the terminal marked ”4i2" or ”4 ohms" on the
receiver or amplifier should be used. (See Section IV E.)
3. FUSING YOUR 901 SPEAKERS
Any loudspeaker is subject to damage if the amplifier powering it should fail. The use of a fast-acting fuse
in series with each speaker will minimize the possibility of serious damage to your speakers. BOSE Corpo­
ration recommends the use of a 3-ampere fuse, such as a BUSS AGC 3 or a LITTELFUSE 3 AG
(3 amp). The fuse should be connected in series with either of the two wires in the cable to each
speaker. A fuse holder, like a BUSS 3833-1 or a LITTELFUSE 356001. may be used for convenience. (For
two pairs of BOSE 901s, use two 6-ampere fuses.)
C. CONNECTING THE EQUALIZER
THIS PART OF THE INSTALLATION DIFFERS FROM THAT OF CONVENTIONAL SPEAKER SYSTEMS.
BE CERTAIN TO FOLLOW THE INSTRUCTIONS GIVEN BELOW, STEP BY STEP.
1. PREFERRED METHOD
(Using The Tape Monitor Circuit)
To provide the proper balance at all frequencies, the 901 Active Equalizer must be connected in your sound