Radio Shack Optimus Bedienungshandbuch PDF herunterladen (Seite 10)

10

Speakers

4. To determine the total impedance of

speakers connected in serial and

parallel combined, divide the imped-

ance of one pair of speakers by the

number of pairs.

For example, if you want to connect

four 8-ohm speakers in serial and

parallel combined, divide 16 (the

impedance of one pair of speakers)

by 2 (the number of speaker pairs)

for a total speaker impedance of 8

ohms.

5. Connect the negative (–) terminals

of all pairs of speakers to the ampli-

fier’s

COM terminal.

6. Connect the positive (+) terminals of

all pairs of speakers to the ampli-

fier’s terminal that matches the total

speaker impedance (

8Ω

ΩΩ

Ω, in this

example).

Multiple Speakers with

Transformers

For complex multiple-speaker arrange-

ments that require many speakers and

long runs of connecting wire, we recom-

mend you use a line transformer (not

supplied).

Note:

When running lengths of wire

longer than 50 feet, use wire that is

heavier than 16 gauge.

There are several advantages to using

transformers.

• You can connect speakers with dif-

ferent impedances without causing

differences in output between the

speakers.

• You can add or remove a speaker

without having to recalculate the

entire system’s impedance.

• You can reduce signal loss when

you use speaker wire over 50 feet

long.

You need a separate transformer for

each speaker.

Line transformers have several connec-

tors called taps.

The primary taps (on one side of the

transformer) are the inputs and are rated

in watts. The secondary taps (on the op-

posite side of the transformer) are the

outputs and are rated in ohms.

Taps

Primary

Taps

Secondary

Taps

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