Connecting Speakers; One Speaker; Two Or More Speakers Without Transformers - Radio Shack 32-2001 Owner's Manual

32-2001.fm Page 7 Friday, February 4, 2000 7:53 AM
• If you connect more than two speak-
ers using only series or only parallel
connections, the total impedance
might exceed the amplifier's maxi-
mum impedance (16 ohms) or fall
below its minimum impedance (4
ohms).
For example, if you connect four 8-
ohm speakers:
–In series, the total impedance is 32
ohms (8 + 8 + 8 + 8 = 32). This
exceeds the maximum rating.
–In parallel, the total impedance is 2
ohms (8 4 = 2). This falls below
the minimum rating.
You can arrive at a proper total
impedance by combining series and
parallel connections.

CONNECTING SPEAKERS

You need speakers and wire to com-
plete the connections to your amplifier.
Use 16-gauge wire or larger. For parallel
connections or those involving more
than two speakers, you also need wire
connectors. All of these items are avail-
able at your local RadioShack store.
Remove about 1 inch of insulation from
both ends of each wire. Then twist the
exposed wire to secure all its strands.
Connect the speaker wire to the amplifi-
er by pressing down on the appropriate
push terminal tab and inserting the end
of the twisted wire into the terminal's
hole. Then release the tab to secure the
wire.
You can connect one or more 4-, 8-, or
16-ohm speakers, with or without trans-
formers, between the amplifier's output
and the speakers' input. To ensure
equal volume from each speaker, all the
connected speakers should have the
same impedance rating.

One Speaker

Connect the speaker's negative (–) ter-
minal to the amplifier's
terminal. Then connect the speaker's
positive (+) terminal to the amplifier's
terminal that matches the speaker's im-
pedance. For example, if you have an 8-
ohm speaker, connect the speaker's
positive terminal to the amplifier's 8-ohm
terminal.
Two or More Speakers Without
Transformers
We recommend connections without
transformers if the length of the connect-
ing wires between the amplifier and the
speakers is 50 feet or less.
When making connections
transformers, all the speakers must
have the same impedance rating to en-
sure equal volume from each speaker.
When there is more than one speaker in
a sound system, you must determine the
total impedance of the speakers before
(common)
COM
8 Speaker
without
7