Bose 301 - Manual (Page 8)

B. Connecting the Speakers
1. POWER REQUIREMENTS The Model 301 is designed to be
powered by the majority of the fine amplifiers and receivers that
are on the market today. Power requirements will vary substan­
tially with room size, speaker placement, and type of music played.
High quality sound requires less than 10 watts rms per channel,
although amplifiers rated up to 60 watts rms per channel may be
used.
2. WIRE SELECTION If the wires to your speakers are less than
30 feet long. 18-gauge zipcord (two-conductor) wire is recom­
mended. If 30- to 50-foot lengths of wire are needed, 16-gauge
two-conductor wire should be used.
If your dealer doesn't provide you with speaker wire, it can be ob­
tained at most hardware stores.
Choosing the correct wire size insures that the wire connecting
your speakers doesn't have too much resistance. Excessive re­
sistance causes audible coloration and loss of power with all speak­
ers.
3. PHASING It Is important that the connections to the speakers
and the receiver or amplifier be the same for both channels so
that the two speakers are in phase with each other.
Refer to Diagram 5 as you do the following steps:
1. Start with the speaker marked "Part 1".
2. Place it on the left side of your room.
3. Locate the "PCS" and "COM" terminals on the rear of the
speaker.
4. Using your speaker wire, which is marked to distinguish one
conductor from the other by means of color or grooved ridges,
connect the terminal marked "COM" on the back of the left
speaker to the terminal marked "COM," "negative" or (-), on
the left channel amplifier output.*
5. Connect the "POS” terminal on the left speaker to the terminal
marked "POS." "positive” or (+), on the left channel output of
the amplifier or receiver.
6. Place the speaker marked "Part 2" on the right-hand side of the
room and repeat the connection procedure.
4. FUSING V\^en using the Model 301 with amplifiers rated at
more than 60 watts rms per channel, or with sinusoidal or other
test signals, we recommend that the speaker be protected by a
BUSS MDL IV^amp "slow-blow" fuse (or equivalent) using an
in-line HDH fuseholder (or equivalent) wired in series on the posi­
tive side of each speaker cable. The fuse will also provide pro­
tection against speaker damage in the event of amplifier failure.
•When connecting to your amplifier, if there is a choice of imped­
ances on the amplifier output, use the terminal marked "8” or "8
ohms." If two pairs of Model 301s are being connected in parallel,
the terminal marked "4" or "4 ohms” on the receiver or amplifier
should be used.