Radio Shack 04A00 Grounding The Input Source, Connecting Speakers, Preparing the Speaker Wires

amplifier. Then, make sure STEREO/MONO	speakers, use this table to determine the
on the back of the amplifier is set to MONO.	wire length and choose the appropriate
	gauge.

Wire Length

Wire Gauge

25 feet or less

18 gauge

Over 25 feet

16 gauge

GROUNDING THE INPUT SOURCE

To avoid a low frequency hum, connect your audio mixer’s or preamplifier’s ground wire (usually black or green) to the GND terminal on the back of the amplifier.

CONNECTING SPEAKERS

You can connect one or more 4-, 8-, or 16- ohm speakers to the amplifier. You can also bridge the amplifier’s channels.

The amplifier has two channels: A and B. If you connect two pairs of speakers, follow these guidelines:

•Speakers connected to the same chan- nel (A or B) are part of a pair and must be of the same impedance.

•Speakers connected to different chan- nels (A or B) are not part of a pair and can be different impedances.

Most speaker terminals are color-coded or have a mark that indicates the terminal’s po- larity. Usually, terminals with positive polarity are red or have a plus symbol (+), and termi- nals with negative polarity are black or have a minus symbol (–). Phasing is correct when you connect + to + and – to –.

Preparing the Speaker Wires

Use the shortest length of wire possible to connect the speakers. After placing the

To prepare the speaker wire, remove about 1 inch of insulation from the end of the speaker wire you are connecting to the amplifier. Then twist the exposed wire to secure all of the wire strands.

Split strands
about 4”		Wire Strands
	1"

Unbridged Connection

Use this connection if you are connecting more than one speaker on the same channel or if you do not have high-power speakers.

1.Connect the speaker wires to the corre- sponding left and right

speaker’s positive (+) and negative (–) ter- minals.

2.Connect the other end of the left and right speaker’s positive (+) and negative

(–)wires to the amplifier’s correspond- ing SPEAKERS LEFT and SPEAKERS

6 Connections